command_line support (#18)

* Update wrapper.py

* entry points cli

* Suppress the urllib2/3 Exception

* rm cli code, will create a new cli.py file

* Create cli.py

* update cli entry pts

* Update cli.py

* Update cli.py

* import print_function

* Update cli.py

* Update cli.py

* Delete pypi_uploader.sh

* resolve conflicts with the master

* update the test ; resolve the conflicts

* decrease code complexity

* cli method changed to main

* get is not for just local usage

* get method should be available from interface

* get is used in the interface

* Update cli.py

waybackpy/wrapper.py

@@ -89,7 +89,7 @@ class Url:
         header = _get_response(req).headers
         return "https://" + _archive_url_parser(header)
 
-    def _get(self, url="", user_agent="", encoding=""):
+    def get(self, url="", user_agent="", encoding=""):
         """Return the source code of the supplied URL.
         If encoding is not supplied, it is auto-detected from the response.
         """