use all tech center frames
setup all biolab frames
setup all hospital frames
added mods/common/lua scripts
added mods/cnc Lua scripts
test for a list of files when loading mods

don't cache test file string arrays
cleanup
Merge pull request #4510 from ihptru/cleanup

cleanup map downloading
fix #3877;
Merge pull request #4514 from ihptru/fix3877

do not create empty map on fail to download
Catch IOExceptions in Connection.cs. Closes #4083. Closes #4423.
Show an error dialog if disconnected from the server.
Update changelog.
Merge pull request #4519 from pchote/network-crash

Catch IOExceptions in Connection.cs.
Merge pull request #4523 from pchote/disconnect-dialog

Show an error dialog if disconnected from the server.
Unify ra and cnc main menu logic and clean up the main menus.
Move a bunch of buttons into an Extras submenu and the server browser.
Move CncMenuPaletteEffect to ra so it can be used elsewhere and rename it to MenuPaletteEffect.
obelisk health upgrade to same level as ATWR
Update CHANGELOG: add entries for new menus and reword some existing entries
Merge pull request #4520 from ScottNZ/new-menu

Unify ra and cnc main menu logic
capturable husks for Tiberian Dawn