Add content tags to the create community request body, if the user does
not set the content the tags are send with not value. this means if the
user can create a community without calling set content, as they can
with the api.
fix #1645 at OpenNTF/SocialSDK: BaseEntity.exist
fix #1621 at OpenNTF/SocialSDK: CommunityUrls.SUBCOMMUNITIES
fix #1642 at OpenNTF/SocialSDK: Handle tags well
fix #1641 at OpenNTF/SocialSDK: Store community tags also.
Merge branch 'master' into sbtsdk-1.1.1-inovex.ext
Merge branch 'master' into sbtsdk-1.1.1-inovex.ext

Conflicts:
	sdk/com.ibm.sbt.core/src/main/java/com/ibm/sbt/services/client/connections/communities/CommunityUrls.java
Changes in RestClient to allow InputStream bodies.
Merge pull request #1649 from CarlosManias/restclient-inputstream-body

Changes in RestClient to allow InputStream bodies.
Merge pull request #1646 from inovex/sbtsdk-1.1.1-inovex.ext

Fix several issues in com.ibm.sbt.core code.
Merge pull request #1611 from DaviRyan/CommunityServiceException

Add content tags to the create community request body, if the user does
Merge pull request #6 from OpenNTF/master

Update inovex/SocialSDK from OpenNTF/SocialSDK