fixed lib path and manifest file

Author: Jorge A. Gomes

MANIFEST.in

@@ -0,0 +1,6 @@
+include src\raylibpy\bin\32bit\*.dylib
+include src\raylibpy\bin\32bit\*.dll
+include src\raylibpy\bin\32bit\libraylib.so.4.2.0
+include src\raylibpy\bin\64bit\*.dylib
+include src\raylibpy\bin\64bit\*.dll
+include src\raylibpy\bin\64bit\libraylib.so.4.2.0

src/raylibpy/__init__.py

@@ -1425,7 +1425,7 @@ def __init__(self, name, mode=0, handle=None,
 else:
     _bitness = '64bit' if sys.maxsize > 2 ** 32 else '32bit'
 
-_lib_fname_abspath = os.path.join('../lib', 'bin', _bitness, _lib_fname[_lib_platform])
+_lib_fname_abspath = os.path.join(os.path.dirname(__file__), 'bin', _bitness, _lib_fname[_lib_platform])
 _lib_fname_abspath = os.path.normcase(os.path.normpath(_lib_fname_abspath))
 
 print(