changed documentation to create custom Assets
Added carriage returns (\r) to lines written to DDL file.

DDL generated by Ebean uses \r\n. This patch makes Play also use \r\n so the file will have consistent line endings.
More details at https://groups.google.com/forum/#!topic/play-framework/-H0MgRPFd60

Review by @jroper
Backport to 2.0.x
Fixing status in test case (should be 303 not 302)
Merge pull request #769 from nilspreusker/master

Minor fix in docs
Merge pull request #765 from nraychaudhuri/1003_extend_assets_controller

changed documentation to create custom Assets
Merge pull request #766 from stianl/ddl-line-endings

Added carriage returns (\r) to lines written to DDL file.
Merged remote play/master into amanelis/inconsistent-database-wording