Version check updated to 4 digits & bumped to 1.1

- Version bumped to 1.1.0 for the SDK
- Updated the version checker to accept 4 digits since the new
  builds are all 4 digits (major.minor.micro.build)
- Updated version checker to accept a wildcard 'x' if in settings.py
Updated regex to check first robot vers 3 digits.

- Removed the 'x' wildcard version check.
- Added regex carrot ('^') to check the start of version string.
- Only the first three digits of the robot version are now checked.
Merge pull request #44 from RethinkRobotics/rsdk_version_check_fix

Version check updated to 4 digits & bumped to 1.1