Add support for python3

Author: waltsu

flask_inputs/inputs.py

@@ -1,6 +1,7 @@
 
 import collections
 from itertools import chain
+from future.utils import iteritems
 
 from werkzeug.datastructures import MultiDict
 
@@ -31,7 +32,7 @@ def __init__(self, request):
                 fields = dict()
 
                 if isinstance(input, dict):
-                    for field, validators in input.iteritems():
+                    for field, validators in iteritems(input):
                         fields[field] = Field(validators=validators)
                 elif isinstance(input, collections.Iterable):
                     fields['_input'] = Field(validators=input)
@@ -66,7 +67,7 @@ def validate(self):
         """
         success = True
 
-        for attribute, form in self._forms.iteritems():
+        for attribute, form in iteritems(self._forms):
             if '_input' in form._fields:
                 form.process(self._get_values(attribute, coerse=False))
             else:

requirements-dev.txt

@@ -3,3 +3,4 @@ Flask==0.10.1
 jsonschema==2.5.1
 nose==1.3.7
 WTForms==2.0.2
+future==0.16.0

requirements.txt

@@ -1,2 +1,3 @@
 Flask==0.10.1
 WTForms==2.0.2
+future==0.16.0