Merge pull request #5 from opinali/master

DoulbleClick protocol v51, crypto and mapper improvements
Merge pull request #6 from opinali/master

Crypto fixes/opts, float->double fix, mapping mimes and lat/lon
Update README.md
Update openrtb to 0.6.3; crypto tests/docs/cleanups
[maven-release-plugin] prepare release 0.6.3
[maven-release-plugin] prepare for next development iteration