Fixes to travis_build.py script, remove deps from tox.ini
Merge branch 'dev' of git://github.com/omergertel/slash into omerg

Conflicts:
	tox.ini
Separate session log handlers to a session sub-object
Silence warnings as a part of the result reporter tests
Remove unnecessary import
Warnings improvements
cleanup
Add pep8 config file
Cosmetics
#57: Support for custom hooks
Bump version
#59: remove six dependency
Skip pylint on pypy
#41: run_tests - fail if no active session exists
#60: support plugin.deactivate()
#61: provide reason for skip hook
Pylint fixes
Version is now 0.0.3.dev0 before release
#63: don't call deactivate() for non-active plugins
Add more plugin activation/deactivation tests