refactored config for git tree-ish support
further refactored config for git tree-ish support

alternate install name can be specified now in name_specs string
function vundle#config#require() can now accept both list and dict
Refactored installer for git tree-ish support
Update git commands

Update git commands for bundle install and upgrade for better
git tree-ish support
Revert changes to git commands for bundle update. Update README
add example of 'local' flag to README
Added function to check if bundle registered with vundle
Merge branch 'master' of https://github.com/gmarik/vundle into tree

Conflicts:
	autoload/vundle/installer.vim