aliases: add pbnofmt

Use it when you want to drop formatting information in your clipboard.
bootstrap: fix bug in gitconfig setup

I changed the location where script writes files, but didn't change the
location where the script checks for the file.
osx: increase dock size

way too small before
bash: Add git completion and add branch to prompt
ruby: Add gemrc, don't install docs
bash_prompt: display full path (ubuntu default)
osx: tweak transmission settings