Pull up on bundles

This patch incorporates updates from several plug-ins including:

  * TeX-9
  * UltiSnips
  * ctrlp
  * delimitMate
  * dispatch
  * endwise
  * fugitive
  * json
  * ragtag
  * surround
  * tlib
  * unimpaired
  * vimux

It also makes sure that the version of vim-colors-solarized being used
by this configuration is the one with better support for Tagslist.vim.