updated SQL schema in order to supports advanced settings
update settings in order to keep default separated from runtime variables
updated serialization and REST to supports advanced settings
merged master & solved node.py conflict
updated GLSettings.memory_copy and .defaults
updated notification table with Title template
minor fixes
updated models, SQL, admin, anon, REST on new vars
fixed unitTest with new UI vars supports
fixed submission_abuses
fixed UT in test_models
minor fixes in unitTest (jobs, notification, tip)
Merge branch 'feature/configurable-settings'

Conflicts:
	globaleaks/db/__init__.py
	globaleaks/handlers/admin.py
	globaleaks/handlers/node.py
	globaleaks/runner.py
	globaleaks/utils.py