Bump version number.
Merge branch 'release/0.8'
Merge tag '0.8' into develop

2014-05-27  Kirit Saelensminde  <kirit@felspar.com>
 Fix a problem when using the create operation on a model where the primary key is also a foreign key.

2014-05-27  Suhrid Satyal  <suhridsatyal@proteus-tech.com>
 Add utf-8 charset to json and xml response by default

2014-04-22  Siraset Jirapatchandej  <siraset@proteus-tech.com>
 Handle blank request.body

2014-04-10  Chirapat Harigulrak  <chirapat@proteus-tech.com>
 Implement require permissions decorator which take list of permissions as parameter.

2014-03-13  Eddy Zhow  <eddy@proteus-tech.com>
 Add charset to html response content type.