Add gmpl and openscan, closes #232, closes #233

ftplugin/openscad.vim

@@ -0,0 +1,18 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'openscad') == -1
+  
+" Blatantly stolen from vim74\ftplugin\c.vim
+
+" Set 'formatoptions' to break comment lines but not other lines,
+" and insert the comment leader when hitting <CR> or using "o".
+setlocal fo-=t fo+=croql
+
+" Set 'comments' to format dashed lists in comments.
+setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
+
+" Win32 can filter files in the browse dialog
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+    let b:browsefilter = "OpenSCAD Source Files (*.scad)\t*.scad\n" .
+	  \ "All Files (*.*)\t*.*\n"
+endif
+
+endif