Document token hash algorithm option

With https://review.openstack.org/#/c/116509/ ,
django-openstack-auth will support a new option for the token hash
algorithm. This adds the documentation to Horizon's local settings
example file.

This is for security hardening. The token hash algorithm defaults
to MD5, which is considered too weak due to the potential for hash
collisions. Some security standards require a SHA2 hash algorithm to
be used.

DocImpact
SecurityImpact

Change-Id: I6774b9b7215d191259586e4721e357487bb777cd
Closes-Bug: #1174499
remove read-only network ID field from Edit Network form

Remove unnecessary field network_id from UpdateNetwork form.
Currently field is required to pass it to the
api.neutron.network_update method, but there is also
self.initial dict where the value can be get.

Closes-Bug: 1372348
Change-Id: I5cf9efa468d3f0a57d20e5ae54f74425d01ac606
Make Image Description an input field instead of a textarea

The glanceclient passes the value of the "Description" field as
HTTP headers to the API, completely unmodified.  If there are
newlines in the content, it corrupts the headers and creates havoc.

Encoding/decoding the results is not viable, since arbitrary (and
not necessarily controlled by anyone) clients can retrieve the data.  So as
a dodge, use a normal <input> field for Description instead of
<textarea> field, as newlines are not permitted in the former.

Closes-Bug: 1370732
Change-Id: I0231eaa693e7f36699fda6e011db8c976b639411
Use action_present/past methods in BatchAction

action_present/past methods were introduced in BatchAction to allow
translators to control word orders and plural forms. This patch
replaces the remaining old attribute version of action_present/past
with the method version.

Change-Id: I9f1cc8ff862471f33a5cb40f9e210c5222b7fb94
Partial-Bug: #1307476
Imported Translations from Transifex

Change-Id: Ic1b42fea349e011da07e2a39c735dfa32a637284
Merge "Use action_present/past methods in BatchAction"
Merge "Imported Translations from Transifex"
Merge "remove read-only network ID field from Edit Network form"
Merge "Make Image Description an input field instead of a textarea"
Merge "Document token hash algorithm option"
Merge branch 'master' of https://github.com/openstack/horizon