Added:
- HL1 Movement Support
- HL1 Cvar to enable HL1 Movement: hl2_mov_mode 0/1 ( 0 for HL1 / 1 for HL2 ) default is HL2

added new cvar hl2_backward_jumping (helps in backward jumping speed)
added compatibility for TFA
added fix for ladder usage.

Added small changes like new cvar: hl2_auto_accelerate

hl2_mov_enable 0/1
Cvar to switch movement type. Need to respawn to apply.
hl2_bhop_enable 0/1
Cvar to swtich auto jumping.
hl2_propclimb_enable 0/1
Cvar to switch prop climbing.

Added bhop cvar and prop surfing.

Initial addon creation.