Merge pull request #7 from cbtlsl/master

Fix elseif.

Add ability to load random colorscheme on startup.

Update colorscheme_manager.vim

Add option to remember the background of the last colorscheme.

Update install instructions in readme

Merge pull request #2 from punknroll/master

fixed error undefined variable: g:colorscheme_switcher_exclude

Clean up, move some global variable initialization for safety.

Update help & readme.

Don't cycle on adding a colorscheme to blacklist if its not the currently loaded one.

augroup end->augroup END

Fix wrong help tag

Tweak readme, add :help file.

readme: 3 more https->http