Update README.markdown

Added information from this forum topic on how to add a bundle to the list: https://groups.google.com/forum/#!searchin/spf13-vim-discuss/install/spf13-vim-discuss/s_PMWxVVogM/otCEQs0ZlsYJ
Merge pull request #675 from jaguarondi/patch-1

Update README.markdown
Update .vimrc

I don't want trailing spaces in my sql :-)
 added check for override_spf13_bundles in vimrc
Swapped out terryma/vim-multiple-cursors for the better supported kristijanhusak/vim-multiple-cursors
Merge pull request #691 from seyDoggy/3.0

Swapped vim-multiple-cursors
Fixed edit shortcuts for paths containing spaces

This is the current implementation on http://vimcasts.org/e/14 
The original one would not work for paths containing spaces or other strange characters.
Remove traillings
Updated readme section on windows spf13-vim installation
Added prompt for Chocolatey install example and fixed package link
Merge pull request #700 from switchspan/3.0

Updated windows install information in README
Merge pull request #698 from leowzukw/patch-2

Remove traillings
Merge pull request #687 from edi9999/patch-1

Update .vimrc
Merge pull request #689 from drake01/3.0

 added check for override_spf13_bundles in vimrc
Merge pull request #697 from regedor/3.0

Fixed edit shortcuts for paths containing spaces
Update to ctrlpvim/ctrlp.vim

kien/ctrlp.vim hasn't been update for over 1 year, and the ctrlpvim version is working better, especially it will order the files intelligently, showing first exact matches
Add elixir group to .vimrc.bundles
Fix missing endif in group Elixir
Add snipets support and mix compilation for elixir group
Merge pull request #703 from fabianhjr/3.0

Add elixir group to .vimrc.bundles