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in various places around Mahara to be more consistent
with what people see on the interface.

Change-Id: I83e088d39964ecd1d72945973fd0b4995b82da65

- have added this as a separate patch in case it is not needed

Change-Id: I87378a0d831727c405cc6135ba6f6e5e4a722813
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>

Change-Id: If0dbdd62c48b67424785912fcbf9db8176756557
Signed-off-by: Kristina D.C. Hoeppner <kristina@catalyst.net.nz>

Change-Id: Ic75fccdb977d46012d8ded608a9ab3a3e5f730af
Signed-off-by: Kristina D.C. Hoeppner <kristina@catalyst.net.nz>

The four existing jointypes, 'open', 'controlled', 'request' and
'invite' are mutually exclusive, but they don't need to be so strict.
This patch introduces more flexibility in the way groups allow new
members to join.

* Group admins can always send membership invitations to a group, even
  if it's open or controlled
* Membership requests can be enabled for any group unless it has open
  membership.
* The grouptype now determines the set of roles available to a group,
  but no longer restricts the available join types.

The db upgrade will preserve existing behaviour apart from enabling
invitations on open, request, and controlled groups.

Change-Id: I8bb0940a37f3c0c36366c1d5b8d27e8b9914a7e3
Signed-off-by: Richard Mansfield <richard.mansfield@catalyst.net.nz>

Signed-off-by: Richard Mansfield <richard.mansfield@catalyst.net.nz>

Signed-off-by: Richard Mansfield <richardm@catalyst.net.nz>

Signed-off-by: Ruslan Kabalin <ruslan.kabalin@luns.net.uk>

Moved group type help files to the correct location and updated their text to match how groups work in 1.1.