v0.3.2

Changelog:

• add __thrift_meta__ attribute to loaded module, via #138.
• add type validation before write data to transport, via #149 and #150.
• add load_fp api to load thrift from file like object, via #154.
• add support for recursive struct definition, via #155.
• add support for integer boolean constants, via #161.
• simplify the read_i08() bool result cast, via #162.
• performance improvements on payload init() func, via #163.
• bugfix for parsing of duplicate field name or id, now will raise error when duplicates detected, via #139.
• bugfix for server side transport not connected error when closing socket, via #143.
• bugfix for a typo error in default_spec generation, via #145.
• bugfix for i16 byte swap bug in OS X, via #148.