Changes

Add CrackShot support. (#323)

* Add CrackShot support.
Add <crackshot.get_weapon[<weapon_name>]> to retrieve an ItemTag for the weapon specified.
Add ItemTag.crackshot_name to retrieve the CrackShot weapon title.
Add EntityTag.shot_from to retrieve the CrackShot weapon title that the projectile was shot from.
Add Events for:
- Projectile Fired
- Starting to Fire
- While Firing
- Toggling Weapon Attachments
- Entity Damaged by CrackShot weapon
- Landmine Placed
- Landmine Triggered
- Reload Start
- Reload Finish
- Crackshot Weapon Explosions

* Slight reformat to match mcmonkey's comments.

* Changed URL formatting

* Change 'weapon_name' to just 'weapon'

* Remove redundant PlayerTag objects

* More Fix

* More fix

* `, getTagContext(string, path);`

Fixes #317
(commit: 988272b)