core (memory/encryption): set encrypted flag also for outgoing messages and put it in extra: - `encrypted` flag is now put directly in extra, so that there is nothing to change when sending the message to bridge for frontends to be aware of it. - this flag is now also set when markAsEncrypted is used, so frontend can display appropriate indicator to show that outgoing message is encrypted or not.

include MANIFEST.in sat/VERSION
global-include *.py
global-include *.ini
global-include *.po *.mo
global-include CHANGELOG COPYING* INSTALL README*
global-include *.sh
global-include Makefile *.rst *.bat
graft misc
graft doc
include sat_frontends/jp/jp sat_frontends/primitivus/primitivus
include sat/bridge/bridge_constructor
global-exclude *.un~
prune sat/bridge/bridge_constructor/generated