Update homesick.rb to make https default for GitHub clones.

If we use HTTPS it is a lot easier for corporate worlds to manage proxies since its usually already done for us. Also HTTPS cloning is just as fast as the git protocol as of more recent versions.

lib/homesick.rb

@@ -32,7 +32,7 @@ class Homesick < Thor
         ln_s uri, destination
       elsif uri =~ GITHUB_NAME_REPO_PATTERN
         destination = Pathname.new($1)
-        git_clone "git://github.com/#{$1}.git", :destination => destination
+        git_clone "https://github.com/#{$1}.git", :destination => destination
       elsif uri =~ /%r([^%r]*?)(\.git)?\Z/
         destination = Pathname.new($1)
         git_clone uri