Merge pull request #8 from FreekDB/explain_blend_properties

Added explanation for the .blend.properties file.
Fixed the tranSMART link.
Changed API key name

The API key name used in the blend4j sources is currently "test.galaxy.key" instead of "test.api.key". Maybe it's clearer to include api in the key name, but I propose to change the readme until we've decided.
Merge pull request #10 from FreekDB/patch-1

Fixed the tranSMART link.
Merge pull request #11 from FreekDB/patch-2

Changed API key name