add method `allPropertyClassesInClass:aClass`in`GRJSONHelper`

0.1.5

add method

if can not get property class,set it to NSNumber

0.1.4

update other info

fix a crush

0.1.3

fix crush

fix a crush

0.1.2

fix crush

fix crush when formating wrong json to model

0.1.1

update CHANGELOG

if value is NSString and property class is NSNumber,format value to NSNumber and the reverse

0.1.0

if value is NSString and property class is NSNumber,format value to N…

set value to ni if json string is '[]'

0.0.9

set value to ni if json string is '[]',because empty will be formated…

delete gr_allowedPropertyNames and fix some bug

0.0.8

Update README.md

for cocoapods

0.0.7

Update README.md

fix the bug of gr_useNullProperty

0.0.6

fix the bug of gr_useNullProperty