Prepare vim/vim.rb for namespacing

All of the additions to the VIM module are going to move inside the
CommandT namespace, to play nicely with other Ruby plugins.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

ruby/vim.rb

@@ -26,11 +26,11 @@
 
 module VIM
   def self.has_syntax?
-    VIM::evaluate('has("syntax")').to_i != 0
+    ::VIM::evaluate('has("syntax")').to_i != 0
   end
 
   def self.pwd
-    VIM::evaluate 'getcwd()'
+    ::VIM::evaluate 'getcwd()'
   end
 
   # Escape a string for safe inclusion in a Vim single-quoted string