New 'path' generation
New 'path' generation

The 'path' is now simply Ruby's load path, prefixed with the global
'path' if it was set to a default value.  Notably, this means the
current working directory is only included if Ruby itself included it
(true on 1.8, but not 1.9).

Closes #32.

trafodion/vim-setup,trafodion/vim-setup