v0.3.0

• Add :GhcModTypeInsert and ghcmod#type_insert() that inserts a type signature under the cursor (@johntyree, #15)
• Add :GhcModInfoPreview that shows information in preview window (@johntyree, #15)
• Make the parsing of check command more robust (@marcmo, #21)
• Add buffer-local version of g:ghcmod_ghc_options