Werobot

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+ Fix Python 3 support

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+ Fix typo

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+ Add ``werobot.client``
+ Add ``werobot.config``
+ Add ``werobot.logger``
+ Add ``werobot.key_click`` (Thanks tg123)
+ Support Location Event
+ Use smart args
+ Friendly 403 page
+ Improved server support
+ Enable session by default.
+ Drop ``werobot.testing.make_text_message``
+ Drop ``werobot.testing.make_image_message``
+ Drop ``werobot.testing.make_location_message``
+ Drop ``werobot.testing.make_voice_message``
+ Drop ``werobot.testing.WeTest.send``
+ Rewrite ``werobot.message``
+ Rewrite testing case

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+ Add VoiceMessage
+ Add ``message.raw``: Raw XML of message
+ Rename ``UnknownMessage.content`` to ``UnknownMessage.raw``
+ Fix a bug when signature is invalid.
+ Ignore session when receive UnknownMessage

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+ Add session support
+ Add logging support
+ Rename ``werobot.test`` to ``werobot.testing``
+ Handlers added by ``robot.handler`` will have the lowest priority.

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+ Bug fix: Make ``BaseRoBot`` importable