Added detection for the new Logtalk language

lib/linguist/languages.yml

@@ -566,6 +566,12 @@ Literate Haskell:
   extensions:
   - .lhs
 
+Logtalk:
+  type: programming
+  primary_extension: .lgt
+  extensions:
+  - .lgt
+
 Lua:
   type: programming
   primary_extension: .lua

lib/linguist/mimes.yml

@@ -53,6 +53,7 @@ application/xaml+xml @xaml :8bit
 image/x-icns @icns
 text/cache-manifest @manifest
 text/plain @cu,cxx
+text/x-logtalk @lgt
 text/x-nemerle @n
 text/x-nimrod @nim
 text/x-ocaml @ml,mli,mll,mly,sig,sml