core (log): refactoring + twisted backend: - configuration is now done with classes, so inheritance is possible - twisted backend now use twisted log methods - log not produced by SàT directly in twisted backend are captured by an observer (twistedObserver) and sent back to SàT logging chain, with the "twisted" logger. - \\default output use normal twistd output, except in debug mode where it add an stdout output in addition to the log file. - when log_colors = True, colors are enabled only where it's possible (tty out), when log_colors=force colors are always enabled. - fixed some bad log.xxx calls

include MANIFEST.in distribute_setup.py
global-include *.py
global-include *.ini
global-include *.po *.mo
global-include CHANGELOG COPYING* INSTALL README*
global-include *.sh
include src/sat.*
include frontends/src/jp/jp frontends/src/primitivus/primitivus frontends/src/wix/wix
include src/bridge/bridge_constructor/mediawiki_template.tpl
prune src/bridge/bridge_constructor/generated