Consolidate crud_strings title_create + label_create_button + subtitle_create -> label_create

Also Removed:
views/msg/group_user_header.html
views/msg/group_user_list.html
views/msg/group_user_list_create.html
as it appears msg_user_group no longer exists?

The changes were implemented using a combination of this script: http://pastebin.ubuntu.com/7106258/ - and hours of manual tweaking!

Changes have been manually reviewed, smoke tested & unit tested (One unit test failed - but this failed before the changes too - See below)

Failed Unit Test:
 ======================================================================
FAIL: testURLTargetOverrideComponent (applications.eden.modules.unit_tests.s3.s3rest.URLBuilderTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "applications/eden/modules/unit_tests/s3/s3rest.py", line 193, in testURLTargetOverrideComponent
    "/%s/pr/person/%s/contact/%s/method.xml?test=test" % (a, p, c))
AssertionError: '/eden/pr/person/1/contact/1/method.xml?test=test' != '/eden/pr/person/1/contact/3/method.xml?test=test'

----------------------------------------------------------------------