* Update CUtlSymbolTable and tier1 project file
* Fix unintended change
* change nullptr to NULL
* Remove utlsymbol
* Fix CUtlStringMap using the wrong variable
* Add default null value to the new argument
* Remove unneeded parameter in CUtlStringMap operator[]
* fix makefile line ending
- Remove tier1 interface/factory funcs that no longer exist.
- Add/fix tier0 interface funcs.
- Fix tier0 win64 link lib to have correct decorated names for Msg, Warning, etc.
- Update Error() shim to act more closely to old behavior.
- Moved CreateInterface impl to interfaces lib (appears to not be in tier1 anymore).
- Removed exports log channels that aren't exported in S2.