fix relative import for py3

kociemba/__init__.py

@@ -6,16 +6,17 @@ class SlowContextWarning(Warning):
 
 try:
     import os
-    from ckociembawrapper import ffi, lib
+    from .ckociembawrapper import ffi, lib
     cache_dir = os.path.join(os.path.dirname(__file__), 'cprunetables')
 
     def _solve(s):
         res = lib.solve(s.encode('utf-8'), cache_dir.encode('utf-8'))
         if res != ffi.NULL:
-            return ffi.string(res).strip()
+            return ffi.string(res).strip().decode('utf-8')
         else:
             raise ValueError('Error. Probably cubestring is invalid')
-except ImportError:
+except ImportError as e:
+    print(e)
     warnings.warn("Native version of the package is not available. "
                   "We have to fallback to pure-Python implementation of "
                   "the algorithm, which is usually many times slower. "

setup.py

@@ -3,7 +3,7 @@
 
 setup(
     name='kociemba',
-    version='1.0.1',
+    version='1.0.2',
     description='Python/C implementation of Herbert Kociemba\'s Two-Phase algorithm for solving Rubik\'s Cube',
     keywords='kociemba rubik cube solver twophase',
     url='https://github.com/muodov/kociemba',