file layout
stubby test layout
Merge branch 'develop' into feature/issue-729-wechat-transport
auth
parsing & building xml
accept XML, decode & recode and return
better timestamp comparison
roundtrip working but not yet xml
basic chat messaging functionality with WeChat
add support for event messages
verify post requests
handle unsupported message types gracefully
pushing of messages
minimal docs on supported message types
pep8 fixes
requesting access token
menu creation
relay menu key press events
give EventKey event messages a different to-addr
switch to_addr based on cached event key