For something very simple, this is a cool idea. Two observations related to install.sh: i) /usr/local/bin/ rather /usr/bin/ is where manually--not handled by package manager--installed software is usually put, ii) chmod & cp are replaceable by a single install command.

edit: And errriclee's gist seems very useful. For example can go around picking some files wanting to replace a string and then can do `run sed -i 's/old/new/' {}`.