Code cleanup

Added compatibility with Custom Role's changes to passive items

Added compatibility with Custom Role's changes to passive items (Thanks Mal!)

Juggernog now gives a +50 max health increase rather than a *1.5 increase

Added an extra error check for TTT2

Hopefully fixed error I couldn't replicate with TTT2

Fixed lua error reading set juggernog health mult

Added new balance convar for PHD Flopper: ttt_phd_only_immune_to_own_explosion 0

- Huge code cleanup
- Ported all old fixes to TTT2, most notably the backup give perk function if the perk bottle is removed mid-drink
- Fixed staminup and speed cola not working on TTT2
- Added a balancing convar for each perk:
ttt_doubletap_firerate_multiplier 1.5
ttt_juggernog_health_multiplier 1.5
ttt_phd_explosion_radius 256
ttt_speedcola_speed_multiplier 2
ttt_staminup_speed_multiplier 1.5
- Finally fixed speed cola icon overriding Custom Roles's zombie speed perk icon

Added check to see if the round is active before giving a perk early