Integrated istanbul code coverage library into TiShadow project. Added -c option to run specs with code coverage and supports all istanbul reports.
Merge remote-tracking branch 'iviamontes-istanbul/master'
fixed code coverage when no instrumented code is executed
Merge remote-tracking branch 'origin/master'

Conflicts:
	cli/support/config.js
	cli/support/socket.js
Merge pull request #299 from iviamontes/master

Added code coverage