Add some simple tests for the Basque grammar

src/basque/tests/README.md

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+# Simple tests
+
+## Morphology of synthetic verbs
+
+Some tests found in `ukanDu.gfs`, `ukanZaio.gfs` and `ukanDio.gfs`. I test the forms against Apertium morphological analyser, you can use your favourite Basque morphological analyser.
+
+In this directory I run it like this:
+
+```
+gf --run < ukanDio.gfs > /tmp/Dio.txt
+```
+
+And in the directory with Apertium, I run this:
+
+```
+cat /tmp/Dio.txt | lt-proc -w eus.automorf.bin | egrep -o "\*(.*)$"  | sort -u
+*didagu$
+...
+*zatzaie$
+*zintzaizkizuekete$
+```
+
+The output is forms that the GF grammar generates but the Apertium analyser doesn't recognise. Some of them are due to overgeneration: forms like "I <some V2> me" don't exist, you should use reflexive instead. So *didagu*  is wrong in the sense that it doesn't exist, but there is no other form that would be more correct. For that reason, I decided to keep these forms and not replace them with an empty string or `nonExist`. 
+If an application grammarian needs to say "I see myself", they can just use  `ReflVP` in `VerbEus`.
+
+Some of the non-existing forms are genuine mistakes, like *zatzaie*, which should be *zatza__zki__e* instead. Then you just go to `AditzTrinkoak.gf` and fix the relevant functions.

src/basque/tests/prepnp.gfs

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+import ../basque/LangEus.gf
+
+gt PrepNP ?  (DetCN (DetQuant DefArt NumSg) (UseN girl_N)) | l -treebank -bind
+gt PrepNP ?  (DetCN (DetQuant DefArt NumSg) (UseN boy_N)) | l -treebank -bind
+gt PrepNP ?  (DetCN (DetQuant DefArt NumSg) (UseN dog_N)) | l -treebank -bind
+gt PrepNP ?  (DetCN (DetQuant DefArt NumSg) (UseN beer_N)) | l -treebank -bind

src/basque/tests/relative.gfs

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+import ../basque/LangEus.gf
+import LangEng.gfo
+
+gr -number=5 DetCN (DetQuant ? NumSg) (RelCN (UseN beer_N) (UseRCl ? ? (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant ? ?) (UseN blood_N)))))) | l -bind -treebank
+gr -number=5 DetCN (DetQuant ? NumPl) (RelCN (UseN beer_N) (UseRCl ? ? (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant ? ?) (UseN blood_N)))))) | l -bind -treebank
+
+gr -number=10 DetCN (DetQuant ? ?) (RelCN (UseN beer_N) (UseRCl ? ? (RelSlash IdRP (SlashVP (DetCN (DetQuant ? ?) (UseN blood_N)) (SlashV2a love_V2))))) | l -bind -treebank
+
+gr -number=10 DetCN (DetQuant ? ?) (RelCN (UseN beer_N) (UseRCl ? ? (RelVP (FunRP ? ? IdRP) (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant ? ?) (UseN blood_N)))))) | l -bind -treebank
+
+gr -number=10 DetCN (DetQuant ? ?) (RelCN (UseN beer_N) (UseRCl ? ? (RelSlash (FunRP ? ? IdRP) (SlashVP (DetCN (DetQuant ? ?) (UseN blood_N)) (SlashV2a love_V2))))) | l -bind -treebank
+
+l DetCN (DetQuant DefArt NumSg) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant DefArt NumSg) (UseN girl_N))))))
+l DetCN (DetQuant DefArt NumSg) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant DefArt NumPl) (UseN girl_N))))))
+l DetCN (DetQuant DefArt NumPl) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant DefArt NumSg) (UseN girl_N))))))
+l DetCN (DetQuant DefArt NumPl) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelVP IdRP (ComplSlash (SlashV2a love_V2) (DetCN (DetQuant DefArt NumPl) (UseN girl_N))))))
+
+l DetCN (DetQuant DefArt NumSg) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelSlash IdRP (SlashVP (DetCN (DetQuant DefArt NumSg) (UseN girl_N)) (SlashV2a love_V2)))))
+l DetCN (DetQuant DefArt NumSg) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelSlash IdRP (SlashVP (DetCN (DetQuant DefArt NumPl) (UseN girl_N)) (SlashV2a love_V2)))))
+l DetCN (DetQuant DefArt NumPl) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelSlash IdRP (SlashVP (DetCN (DetQuant DefArt NumSg) (UseN girl_N)) (SlashV2a love_V2)))))
+l DetCN (DetQuant DefArt NumPl) (RelCN (UseN boy_N) (UseRCl (TTAnt TPres ASimul) PPos (RelSlash IdRP (SlashVP (DetCN (DetQuant DefArt NumPl) (UseN girl_N)) (SlashV2a love_V2)))))

src/basque/tests/ukanDio.gfs

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+import ../LangEus.gf
+
+gt PhrUtt NoPConj (UttS (UseCl (TTAnt ? ?) PPos (PredVP (UsePron ?) (ComplSlash (Slash3V3 give_V3 (DetCN (DetQuant DefArt NumSg) (UseN car_N))) (UsePron ?))))) NoVoc | l -bind
+gt PhrUtt NoPConj (UttS (UseCl (TTAnt ? ?) PPos (PredVP (UsePron ?) (ComplSlash (Slash3V3 give_V3 (DetCN (DetQuant DefArt NumPl) (UseN car_N))) (UsePron ?))))) NoVoc | l -bind

src/basque/tests/ukanDu.gfs

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+import ../LangEus.gf
+
+gt UseCl (TTAnt ? ?) PPos (PredVP (UsePron ?) (ComplSlash (SlashV2a see_V2) (UsePron ?))) | l 

src/basque/tests/ukanZaio.gfs

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+import ../LangEus.gf
+
+gt UseCl (TTAnt ? ?) PPos (PredVP (UsePron ?) (ComplSlash (SlashV2a like_V2) (UsePron ?))) | l