Add --avd-args option to launch avd with additional args
Print all errors while starting emulator
Allow to have more than one emulator started
Wait for emulator is ready after launching it
Merge pull request #2099 from rgonalo/master

Allow to have more than one emulator started
allow testing of ios71 in test.sh, and pass specific versions
make sure we don't error out of pref setting too soon (HT @sebv)
make sure caps are sanitized (fix #2103)