Port gdi04c to New Lua
self-document and un-hardcode the prone sequence prefix
remove unused duplicate stand sequences
remove bogus tab
fix infantry without idle anim staying in fire animation state

closes #5884
add missing TakeCover trait
replace bogus tab with space
Port nod03a to New Lua
Fix a typo in gdi02
Port nod03b to New Lua
remove bogus space tabs
refactor and move ShipUnitTypes to the top
make this a seasonal easter egg
avoid magic numbers
use the new reinforcements methods
bring back Chinook infantry insertion
Copy mod .mdb symbol file together with .dll

Allows for MonoDevelop to debug execution in mod library properly.
Improves tab completion in chat.

Pressing tab after completion now cycles to the next candidate.
Merge pull request #6347 from mizipzor/tab-completion

Improves tab completion in chat.
Remove unused usings and arguments