Set colorscheme light and only use solarized in gvim
disable wordpress.vim
replace plugin Smart-Tabs with vim-easy-align

The drive to make this swap was to correct the issue outlined in #57 but
overall I think this is an improvement.

Other modifications:
- Remap :A <symbol> to align on the symbol (as it did
with Smart-Tabs).
- Add a mapping for <Enter> in visual mode that triggers EasyAlign
  interactive mode for the selected lines
- Add a mapping for <leader>a, which then takes a motion/text object
  that triggers EasyAlign interactive mode for the motion/text object
  (e.g. <leader>a5j will select 5 lines and  trigger EasyAlign
  interactive mode)

Fixes #57
wrap remove_trailing_whitespace in augroup

You can read more about the motivation for this at
http://learnvimscriptthehardway.stevelosh.com/chapters/14.html#using-autocommands-in-your-vimrc
add command :WWS (Write With Spaces)

:WWS allows a file to be saved with trailing spaces, which are usually
removed automatially via a regular expression.

Fixes: #64
add ! to command assignment in .vimrc

without the ! in command!, the command assignment through an error when
re-applied. This was a problem when sourcing .vimrc in an already
running window.
use ag (silver searcher) instead of ack
add ctrl+h,j,k,l window movement
add buffer management shortcuts

- buffer list in airline status bar
- Ctrl+Tab for next buffer
- Ctrl+Shift+Tab for prev buffer
- <f5> for list of buffers ready to accept number to switch to
move configuration to non-hidden files

move .vimrc and .gvimrc to vimrc.vim and gvimrc.vim respectively so the
files are no longer hidden
delete colors ir_black.vim from repo
improvements to README.md
replace nerdtree plugin with vinegar
remove unused plugins vim-align, vmustache, pdvgd
add comments around vundle setup
regroup status line setup
regroup and cleanup appearance settings
group tab/indentation settings
remove nerdtree settings
move buffer in status bar to appearance section