Template for starting a new resource grammar (#441)

Also addressing this https://github.com/GrammaticalFramework/gf-rgl/issues/238 with a README that adds a suggested implementation order.

src/TEMPLATE/ExtendTMP.gf

@@ -0,0 +1,35 @@
+--# -path=.:../common:../abstract
+
+concrete ExtendTMP of Extend = CatTMP
+  ** ExtendFunctor - [
+    VPS           -- finite VP's with tense and polarity
+    , ListVPS
+    , VPI
+    , ListVPI -- infinitive VP's (TODO: with anteriority and polarity)
+    , MkVPS
+    , PredVPS
+
+    -- excluded because RGL funs needed for them not implemented yet
+    , SlashBareV2S
+    , PredAPVP
+    , ComplBareVS
+    , AdvIsNP, AdvIsNPAP
+    , CompBareCN
+    , CompIQuant
+    , ComplSlashPartLast
+    , ComplDirectVQ
+    , ComplDirectVS
+    , DetNPFem, DetNPMasc
+    , ExistCN, ExistMassCN, ExistPluralCN, ExistsNP
+    , ExistIPQS, ExistNPQS, ExistS
+    , PredIAdvVP
+    , PrepCN
+    , ReflPossPron
+    , UttVP, UttVPShort, UttAccNP, UttDatNP, UttAccIP, UttDatIP
+    , EmptyRelSlash, StrandQuestSlash, StrandRelSlash
+    , SubjRelNP
+    , UseComp_ser, UseComp_estar
+    , iFem_Pron, weFem_Pron, youFem_Pron, youPlFem_Pron, youPolFem_Pron, youPolPlFem_Pron, youPolPl_Pron, theyFem_Pron, theyNeutr_Pron
+    , GenModNP
+
+  ] with (Grammar=GrammarTMP) ;