- Warnings were fixed
- Libraries are registered internally when PKVM created
and cleanedup when PKVM freed (if PK_NO_LIBS not defined)
- Lang.clock() moved to time module and sleep, epoch time
were added.
- Support both upper case and lower case hex literals
- Support hex excaped characters inside strings (ex: "\x41")
- Native api for import modules added `pkImportModule(...)`
- pkAllocString, pkDeallocString are changed to pkRealloc.
- NewInstance, DeleteInstance functions now take PKVM however
delete function should not allocate any memory since it's
invoked at the GC execution.
- all import statement (native or script file) have the same syntax
- allow relative (including parent directory) imports
- cyclic imports are handled by caching the scripts
- `import foo` can potentially import `<searchpath>/foo/_init.pk`
- * import are not supported anymore
