Display only reachable IP as Floating IP association target

In Neutron deployments some VM port can be unreachable from
external network and cannot be associated with floating IP.
It is confusing if these ports are listed in Floating IP
Associate form.

Change-Id: I2d8faf0dbf4490d198b883fe1becfd950b1b4d14
Closes-Bug: #1252403
Sort networks and projects by name instead of UUID

Change-Id: I73b9f05303917300121ed99042cdd5004184261b
Closes-Bug: 1375206
Change column uptime

Renamed misleading column uptime

Change-Id: Id72c10a7166943fcfef68c338a1412897ad9cc4b
Closes-Bug: #1156563
Amending the quickstart guide

*Updating to avoid use of manage.py directly.
*Making it more DevStack friendly.
*Adding a sample DevStack local.conf to allow for exercise Horizon
 against more services.
*Added simple developer instructions so new developers aren't tempted
 to work on the DevStack instance of Horizon.

Change-Id: I0840c63183e7cec3b08e4f2ce208479ff7552f60
Imported Translations from Transifex

Change-Id: I464b44a14aa6e4596af148039345bf63fdfe9f0f
Merge "Amending the quickstart guide"
Merge "Imported Translations from Transifex"
Merge "Change column uptime"
Merge "Sort networks and projects by name instead of UUID"
Merge "Display only reachable IP as Floating IP association target"