fixed PEP8 error on plugin_result.py
Merge branch 'master' of https://github.com/quarkslab/irma-common

Conflicts:
	plugin_result.py
merge with testing
add errors code
Merge branch 'testing'
removed leveldict as contribution
added missing plugin module
changed plugin duration to consider milliseconds
removed unused fields (dependencies, raw)
added fonction to cast to unicode
update plugin_result.py to return milliseconds
handle error raise on verify()
fix encode error in to_unicode
add error case status
added timestamp util
simpler plugin result object
reduced output on plugin loading failure
Merge remote-tracking branch 'origin/testing' into 1.0.4
pep8 fixes
add error case status