Use https for rubygems source

http will redirect, but https is recommended
Merge pull request #34 from dwradcliffe/patch-1

Use https for rubygems source
Added notes in config command page
Updated bundle-update.
Bundle path is /vendor/bundle not vendor/bundler

Small typo, but when I was reading the `bundler config` docs I was confused since I thought it was `vendor/bundle`, at least according to this code: https://github.com/carlhuda/bundler/blob/master/lib/bundler/cli.rb#L216
Merge pull request #36 from kamui/patch-1

Bundle path is /vendor/bundle not vendor/bundler
Merge pull request #35 from EmilRehnberg/AddDocumentation

Added documentation for bundle-update and bundle-config
document multiple groups

closes #18
put gems in title, link to ruby setup
add get involved section with links

closes #28, #2
Added more bundle update documentation.
Added some more bundle update documentation
Merge pull request #37 from EmilRehnberg/AddUpdateDoc

Added more bundle update documentation.
formatting on update
actually link 'get involved' links
custom 404 page