Allow units to be destroyed by EMP

[AlexB]

Currently BalloonHover units can be EMP'd in mid-air. They hover deactivated. This makes sense for the Kirov but not for the Siege Chopper. There should be a way to destroy these units and let them crash. The tag could also be used for tanks, infantry and buildings.

##### ADDITIONAL INFORMATION #####
I propose a tag like EMPLimit={yes/no/inair/x}. This would destroy a unit that has this value set to yes, set to inair if it is currently flying, or x frames of EMP is dealt. This would default to no for everything that is not BalloonHover, inair otherwise.

[Bug Importer (bug-importer)]

Code related to this issue has just been checked in; AlexB wrote in revision 564:
Related to issue #896: Implemented as EMPThreshold=int (default: -1). TechnoTypes will be destroyed if they are EMP'd while in mid-air. Set to 0 to not destroy the Techno. Set to positive values to destroy it only if this amount of EMP frames is exceeded.
SVN: http://svn.renegadeprojects.com/listing.php?repname=Ares&path=%2Ftrunk%2F&rev=564&sc=1

[Bug Importer (bug-importer)]

Code related to this issue has just been checked in; AlexB wrote in revision 598:
Related to issue #733: Small alterations. Added Temporal warhead check.
Related to issue #856: Units that are being warped out don't make a good target.
Fixed issue #896: Implemented with string constants.
Fixed issue #878: EMP'd infantry is no longer allowed to deploy. TS doesn't know deployed infantry and thus could not handle it.
SVN: http://svn.renegadeprojects.com/listing.php?repname=Ares&path=%2Ftrunk%2F&rev=598&sc=1

[YR M0ddEr (yr-m0dder)]

Tested in 0.1.881

Work as documented, this can be closed

[AlexB (alexander-b)]

Thanks! Closed.