Allow to access headers with case insensitive keys

• Allow to access headers with case insensitive keys
• Drop support to py33 because of Tornado

Windows Support

also include fixes for these issues: #145, #149

Fix bugs

• Support default type for 'integer', 'number' #128
• Fix bug when accessing ScopeDict with similiar operationId #129

Fix bugs

• add number/int32, number/int64 as supported primitives (#127)
• fix webapp2 client failed with query string
• add missing field: Schema.xml

Fix bugs

• [fix] the default value of collectionFormat is ‘cdv’ #126
• [fix] uniqueItem when array-item is object or array would be failed #125

fix bugs

[fix] Unable to use byte type parameters with Python 3
#120 (by https://github.com/olipratt)

Fix Bugs

[fix]
missing body parameter when referenced from “parameters” field

• #116
• #119

special characters in path parameters not handled correctly

• #117

query parameter doesn't pass to Webapp2's client

• #114

Fix bugs

[fix]

• using App.create() with HTTPS, auth, and custom headers?
  #107
• multiple protocol https: appended request.url in client.request
  #109

[new]

• add pyswagger.getter.SimpleGetter
• pyswagger.io.Request and pyswagger.io.Response has reset(), and could
  be reused.

Fix Bug

• #105 Parameter referencing in PathItemObject.parameters

support python 3.6

python 3.6 is release at the end of 2016, we should catch up with it ASAP.

also include these fixes:

• #92
• #101
• #103