auto restore cursor to last edit position when open file
Populate .vimrc.before with all spf13 options

* .vimrc.before should not be modified (just like any other non-local
  or non-fork config file)
* .vimrc.before contains a list of all options that can be set
* .vimrc.before.local is where these options would actually be set
* support .vimrc.before and .vimrc.before.fork in install scripts
Option to clear instead of toggle search highlighting
Fix solarized if statement

endif came before setting all options
Update some formatting
Merge pull request #447 from sbennett18/before

Populate .vimrc.before with all spf13 options
Merge pull request #449 from sbennett18/3.0

New spf13-vim option, formatting, solarized if statement fix
Update airline documentation

+ Update README and linked image
Merge pull request #454 from jacobwalker0814/airline_doc

Update airline documentation
Merge pull request #446 from perfectworks/saveLastJump

auto restore cursor to last edit position when open file