use official Travis csharp support
allow TAB to switch team/all chat when nothing is auto-completed
implement Ordos nerve gas missiles as warheads

closes #2838
Merge pull request #6679 from Mailaender/change-owner-warhead

Implemented Deviator nerve gas missiles as warheads
Move more traits from Mods.RA to Mods.Common
Rename Util.cs to BuildingUtils.cs
Move Activities CallFunc, RemoveSelf and SimpleTeleport to Common
Move various RA-specific traits to the new folder/namespace structure
Move 'Activity' into its own namespace in OpenRA.Game.
Merge pull request #7129 from reaperrr/ra-common15

More Mods.RA/Mods.Common reorganisation
Reorganise RA-specific parts of Mods.RA a little more
Merge pull request #7073 from Mailaender/travis-csharp

Added official Travis C# support
Decloak on demolish and infiltrate

Per issue #7028, infiltrating or demolishing a building will now cause an
infantry unit to decloak (if it has a cloak ability). This behaviour is
configurable (defaults to true in both cases) using the
DecloakOnInfiltrate and DecloakOnDemolish options.
Add Unit158 to AUTHORS
Merge pull request #7143 from Unit158/AUTHORS

Add Unit158 to AUTHORS
Merge pull request #7138 from DavidARussell/bleed

Applys decloak to units activating a C4 demolition or infiltrate ability
Bring Mods.D2k in line with our new folder/namespace structure
Merge pull request #7039 from Mailaender/bring-back-teamchat-tab

Brought back TAB to switch team/all chat when nothing has been typed yet
Merge pull request #7133 from reaperrr/ra-reorg10

Reorganise Mods.D2k, more reorganisation for Mods.RA
D2k - Added more Rifle Inf. to Starting Units.