Merge pull request #251 from emanlove/master

Removed unnecessary assignment of self.current_index
Merge pull request #252 from emanlove/master

Refixed issue with parsing desired capabilities
Update CHANGES.rst with changes under 1.5
fixes #217 - copy desired capabilities before modifying
Merge pull request #258 from ombre42/master

fixes #217 - copy desired capabilities before modifying
Updated CHANGES.rst
Updated CHANGES.rst and version.py for version 1.5 release.