added fields to questionnaire export: datetime of last login/page access/action done, number of teamwall messages. results are not limited by completion questionnaire anymore.
added twitter block
removed duplicate feedback form
various stuff: caching, code cleanup, documentation, test user utils
added tool for code line count
module name refactoring part 1
module name refactoring part 2
Merge branch 'master' into demoversion..

Conflicts:
	weact_challenge.classes.inc
separared dummy user definition and creation
Merge branch 'master' into demoversion
separated dummy user definition and creation
Merge branch 'master' into demoversion

Conflicts:
	documentation/dummy-users/dummy-user-definitions.php
updated dummy account information
Merge branch 'master' into demoversion

Conflicts:
	documentation/dummy-users/dummy-user-definitions.php
updated dummy account information
Merge branch 'master' into demoversion, user cleanup

Conflicts:
	documentation/dummy-users/dummy-user-definitions.php
fixed module rename regression
Merge branch 'master' into demoversion
some small text changes