up to 1.2.3 (July 9, 2013)
up to 1.2.4 (July 16, 2013)
up to 1.2.5 (July 26, 2013)
up to 1.2.6 (July 26, 2013)
up to 1.2.7 (July 28, 2013)
install to bash-completions 2.0 dir to have completions lazy-loaded
remove json gem dependency as upstream did in .gemspec