Cleaned up portable vimrc.

Comments were added/corrected. Setting the UltiSnips private directory
was moved to the pluginOptions.vim file and plugionOptions.vim was made
to load before pathogen loads plugins.
Rolled UltiSnips back to version 2.1 - 2.2 is broken.

Specifically, 2.2 does not detect filetypes correctly for GVim when
installed using the standard aptitude metapackage. Possibly this is a
python compatability issue?