Merge pull request #1 from matt5188/master

Add constructor to SubredditPaginator with parameter for subreddit
Rewrite Contribution to use inheritance instead of generics
Ability to create a pom.xml file for Bintray
Throw an exception if credentials.txt does not exist
Fix a spacing issue in Endpoints.java
Create Endpoints.java before running on Travis
Use the Gradle binary instead of its wrapper
Travis: Update endpoints before assembling
Add Endpoints.java back
Show how to get this project from jCenter
Wrap the thrown Exception instead of ignoring it in JrawUtils
Merge branch 'master' of https://github.com/thatJavaNerd/JRAW
Update README.md
Implement /search, optional getExtraQueryArgs method in Paginator
Make ContentType into an actual class
Make Listing implement List
Use builders for requests
Add missing Javadoc
Change ApiException's 'constant' to 'code'
Remove RedditObjectParser