Update README.md
Merge pull request #180 from blushmessenger/master

various
update travis configuration
vision:couldNotStartVideoCapture:  ---> vision:capturedVideo:error:

- errors return a nil dictionary with the appropriate error object
update travis
Update README.md
Add option to disable auto-freeze during capture
Merge pull request #184 from bcherry/optional_freeze

Add option to disable auto-freeze during capture
Fix a crash
Merge pull request #188 from rromanchuk/patch-1

Fix a crash
bump podspec to v0.3.2
bump podspec to v0.3.3