[doc] Add referense to http://rsdn.org/wiki/Nitra.ExtendSyntax in Nitra-Mini-C.doc
[doc] Add referense to http://rsdn.org/wiki/Nitra.ExtendSyntax in Nitra-Mini-C.doc

JetBrains/Nitra,JetBrains/Nitra,rsdn/nitra,rsdn/nitra