[ADD] check collection name unique
Merge branch 'sprint2' of https://github.com/blstream/myHoard_Android into sprint2

Conflicts:
	.gradle/1.10/taskArtifacts/cache.properties.lock
	.gradle/1.10/taskArtifacts/fileHashes.bin
	.gradle/1.10/taskArtifacts/fileSnapshots.bin
	.gradle/1.10/taskArtifacts/taskArtifacts.bin