restored sanity checks on int() InternalTip
update API, coherent support of receiver confs
last_activity of internaltip cleaned approach
implemented total delete in Tip
minor fix and cleanings
implemented model and handler for receiver plugin configuration
extended shooter to support receiver configs #23
implemented tests for receiver confs
random GUS generation unrandomized in TESTING mode
test_node.py partially implemented
node model refactored
global gl variables wrapped inside a global singleton
automatic variables in modules (autoincrement ones) need to be defined with default=AutoReload
completed Receiver API and config activation
rewritten notification scheduler with the plugins configuration
updated notification plugin design
updated mail notification plugin #29
minor cleaning and enhancing in models/tip
implemented test for plugin, admin and receiver configuration
test_node.py partially implemented
node model refactored
global gl variables wrapped inside a global singleton
automatic variables in modules (autoincrement ones) need to be defined with default=AutoReload
Amendment to previous commit https://github.com/globaleaks/GLBackend/commit/f6388c597304b3f2b8534b1fc9e8633c48be1457