Install twittering-mode with forked the recipe and add the init file
Add gpg file to .gitignore
Enable twittering-icon-mode when this system has imagemagick

Executes command twittering-icon-mode at the time of loading twittering-mode.el because the variable must not set directly.
Replace string in macro eval-after-load-q with symbol because file arg. of the function eval-after-load can use a symbol (feature)
Conform twittering-retweet-format to Hootsuite's editable retweet style