D day american cards (#15)

* Added 3 cards and FTP & FFI platoons

* moved cards out from an "over-card" to individual entries.  It keeps rules easier to see

* reconfigured how root elements are done.  Beta with Paratroopers and default-add is different, but works fine

* added in a few more cards, renamed para from Mk2

* in progress

* and more changes....

* added james earl rudder

* adding in desert veterans

* refactored M4 company and started related cards

* refactored VET M4 company and started related cards

* more cards and refactorings

* M5 companies done and co re-factored

* refactored Arm Rifle Companies

* refactored rifle companies

* adding restriction to vet M5 platoon

* adding in indian head

* updated rifle mortars and added 4.2" mortar

* added in ivory x

* refactoring M12, M7 and 105 along with adding ivy card

* adding santa fe

* fixing OP entries

* cleaned up rangers

* added in tough ombres

* added in engineer combat platoon

* added in engineer combat company

* added demo specialists

* refactored profile changes for RC.  Indian Head still not 100%

* added old hickory and red devils

* fixed indian head

* old reliables

* cav recon troop

* made stats overridable for Vet Tanks & Vet AR

* added leclerc

* finished "Dutch" and refactored Assault Companies

* TODO: setup sandbag armour to calc based on number of tanks in unit

* most of ddUSA cards done

* fixed sandbag points and added a few more rules

Co-authored-by: hav3rchuck <[email protected]>