sKeypad - Keypads Reinvented

FIXED Reworked persistence logic

FIXED Door ram distance check

FIXED Rare script error

Files Affected:

1. lua\entities\s_keypad\init.lua
2. lua\s_keypad\server\sv_skeypad.lua
3. lua\weapons\gmod_tool\stools\skeypad.lua
4. lua\weapons\skeypad_admin\shared.lua