sReward - The complete reward system!

NEW Ability to have playtime rewards

FIXED Improved the web verification method for discord

REMOVED RPC, this is due to Facepunch patching it

Files Affected:

1. lua\s_reward\sh_sreward_config.lua
2. lua\s_reward\modules\sh_discord.lua
3. lua\s_reward\languages\sh_english.lua
4. lua\s_reward\integration\sv_discordweb.lua
5. lua\s_reward\core\sv_sreward.lua
6. lua\s_reward\modules\sh_playtime.lua