fix some tasks

- added markus namespaces
- resolved some problems linked to assignment's building.
- added '!' to save method to see when it doesn't work.
Fix lib/tasks/simulator.rake
Merge master, fix conflicts
Merge pull request #1179 from danielstjules/issue-239

Issue 239: Cleanup Rake Tasks
Fix i18n_missing_keys.rake
Fix for issue-1182: Fixed Edit button style to be consistent with others
Merge pull request #1183 from xiangyu89/issue-1182

Fix for issue-1182: Fixed Edit button style to be consistent with others
Fixed issue 1184 where the assignment name didnt have a red asterisk beside it
Fixed issue 1184 for french locale
fixed issue-1006. Changed groups_controller.rb to unasign group members and build student_table_rows for them before deleting the group. Updated delete_groupings.rjs to update student table
Merge pull request #1185 from daniyall/issue_1184

Closes #1184: where the assignment name didnt have a red asterisk bes...
Merge pull request #1186 from drunkel/issue-1006

fixed issue-1006. Changed groups_controller.rb to unasign group members ...
Merge remote branch 'upstream/master'