Add support for downloadable cartridges.
Merge branch 'downloadable-cart-support' of
git://github.com/iocanel/openshift-java-client into
iocanel-downloadable-cart-support

Conflicts:
	src/main/java/com/openshift/client/IHttpClient.java
	src/main/java/com/openshift/internal/client/AbstractOpenShiftResource.java
	src/main/java/com/openshift/internal/client/DomainResource.java
	src/main/java/com/openshift/internal/client/IRestService.java
	src/main/java/com/openshift/internal/client/RestService.java
	src/main/java/com/openshift/internal/client/httpclient/FormUrlEncodedMediaType.java
	src/main/java/com/openshift/internal/client/httpclient/IMediaType.java
	src/main/java/com/openshift/internal/client/httpclient/UrlConnectionHttpClient.java
	src/main/java/com/openshift/internal/client/utils/IOpenShiftJsonConstants.java
	src/test/java/com/openshift/client/fakes/PayLoadReturningHttpClientFake.java
	src/test/java/com/openshift/internal/client/DomainResourceTest.java
	src/test/java/com/openshift/internal/client/HttpClientMockDirector.java
	src/test/java/com/openshift/internal/client/HttpClientTest.java
[JBIDE-15429] switching to json request media type

turns out that RoR does not support form url encoded param arrays and
maps properly any more. Thus I had to switch to json encoded parameters
when requesting
Merge branch 'master' into JBIDE-15429
Merge pull request #75 from adietish/JBIDE-15429

Merged by openshift-bot