Added version number to pystencils

Pystencils should have a __version__ attribute

pystencils/__init__.py

@@ -22,16 +22,16 @@ except ImportError:
     pass
 
 
-def _get_file_path():
+def _get_release_file():
     import os.path
     file_path = os.path.abspath(os.path.dirname(__file__))
     return os.path.join(file_path, '..', 'RELEASE-VERSION')
 
 
 try:
-    __version__ = open(_get_file_path(), 'r').read()
+    __version__ = open(_get_release_file(), 'r').read()
 except IOError:
-    __version__ = 'Please install pystencils with setup.py'
+    __version__ = 'development'
 
 __all__ = ['Field', 'FieldType', 'fields',
            'TypedSymbol',