* Modernize Build Scripts
* Fix: Missing dot at extension file name.
Reported by @FortyTwoFortyTwo
* Clean Up: Removed unused variable
* Copying No Longer Needed
Copying the HL2SDK manifest is no longer needed.
Requires latest AMBuild.
* Allow Using Manifests From Project Folder
Check if the manifest already exists in the project folder. If not, then search in the path specified by --hl2sdk-manifest-path.
* Requested Changes by Kenzzer
* Fix Differences Between SDK/No SDK