0.1.2 - Better caching, build actions error handing and special variables

Added error handing for build actions.
Fixed post_file missing ast param for script.lua.
Changed caching to use AMF3 instead of CBOR, which improved cache read and write times dramatically.
Added special variables that get replaced during compile time, see here for what was added.
Moved project intellisense.lua to _intellisense/addon.lua
Added new addons get _intellisense/ssswtool.lua for SSSWTool specific feature's typing.

MIGRATION:
Delete intellisense.lua and re-run ssswtool new addon ./ in the existing project's directory.