Updated my weapon mod.

Fixed some typos and edited the ew_item_groups.json.
Added two new weapons, the CWD-63 and the Wrist DREAD.
Nerfed the ammo a little and should be rarer from now.
Fixed the tabs in modinfo.json
Fixed the ew_item_groups.json
Fixed the whitespace.
Edited the modinfo.json
Fix status window height
Added ability to rescale used tileset at runtime using action.
Re-order game.h member variables so no warning will be generated.
move file_exist to file_wrapper.h/cpp
Fixes description for bio_face_mask.

The unit itself got the right description, but the packaged model
didn't.
Also blade.
Fixed placeholder description.
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA into CBM-description-fix
check for io-errors when saving a character template
add checks for io-errors in various save-functions
add message if writing default mods fails
add map::sees_some_items to check if player can see any items somewhere

use function in cata_tiles and in game.cpp
Fixed the ranged bio weapons. They had a few bugs.
The fusion blaster didn't use ammo.
The lightning generator didn't use moves.
The laser and lightning generator never refunded biopower on a cancel.
And the lightning generator did not do a lot of damage anymore after the bouncing got nerfed.

Fixed the above. Upped the lightning generator damage from 6 to 16. Increaste the install difficulty from 3 to 5. (Same as fusion blaster). Fusion blaster is a lot better vs single targets, lightning works on larger groups to soften them up.

Cleaned up some code in bionics.cpp (duplicated code).

Created the BIO_WEAPON tag. Use it next to NO_AMMO implanted weapons. So the game can create the virtual ammo, and then reduce it by one if the gun fired a shot. Burst fire bio weapons are NOT supported.
Added new flag to documentation.