Check alpha for not present && add wait to reduce fails
Merge branch 'develop' of https://github.com/j-mutter/KIF into develop
Fix logic with step, fails if alpha = 0 and failsIfNotPresent = true
Merge pull request #17 from j-mutter/bugfix/dont-fail-on-alpha=0

Don't fail on alpha = 0 for tapping views, and adds wait to reduce crash time.