adding gloves support, updating the game files, adding JSON support and adding method for generating all skins

[sentisso]

• adding gloves support: all gloves and handwraps can now be generated just as other weapon types
• updating the game files
• adding JSON support: no need to supply the game files in a VDF format, JSON will do just fine
• adding method for generating all skins: a new method getSkinsMap will generate a single large key-value object of ALL the skins (rifles, knives, gloves and handwraps).