Make VERSION easier to access

Until now `algoliasearch.version.VERSION` was needed to obtain the
current version. Only `algoliasearch.VERSION` is now needed.
The change is backward compatible: it is still possible to do
`algoliasearch.version.VERSION`.

Author: LeoErcolanelli

algoliasearch/__init__.py

@@ -25,10 +25,13 @@
 from . import client
 from . import index
 from . import helpers
+from . import version
 
 
 # Compatibility with old import
 class algoliasearch(object):
+    VERSION = version.VERSION
+
     Client = client.Client
     Index = index.Index
     AlgoliaException = helpers.AlgoliaException