Merge branch 'release/0.2.14'
support test vars trough OS ENV variables.

Support specifying a test name for sauce labs or grid via OS vars. "WTF_TESTNAME"
Merge branch 'develop' of https://github.com/wiredrive/wtframework into develop

Conflicts:
	browser-plugins/chrome/wtf_page_mapper/manifest.json
	wtframework/__init__.py
bump up version number
Merge branch 'master' of https://github.com/wiredrive/wtframework into release/0.2.15
Merge branch 'release/0.2.15' into develop