Suppress build warnings 

Hi,
Could you consider to merge this code for fixing the following issues?

#### Developing environment

- OS X 10.8.2
- Version 4.6.1
- Base SDK iOS 6.1

#### Issue

I had two warnings following:

- /CommunityBoard/Controllers/CBPostViewController.m:80:19: <br>
  'UILineBreakModeWordWrap' is deprecated: first deprecated in iOS 6.0
- /Pods/Headers/AFNetworking/AFHTTPClient.h:83:6: <br>
  SystemConfiguration framework not found in project, or not included in precompiled header. Network reachability functionality will not be available.