Update version strings to 1.8.1-SNAPSHOT
Replace deprecated "fill_parent" attribute  with "match_parent"
Migration from Maven to Gradle, including the Gradle wrapper
Merge remote-tracking branch 'remotes/origin/feature/gradle' into develop

Conflicts:
	client/pom.xml
	pom.xml
	ui/pom.xml
Improve UI for the resources list
Fix bug with NPE in ResourceLookupArrayAdapter when ResourceLookup doesn't contain the updateDate
Add adapter for a GridView that is backed by an array of ResourceLookup objects
Update version strings to 2.0-SNAPSHOT
Add sorting support for resources when using the REST v2 Resources Service
Make the ResourceLookupArrayAtapter to be independent of the external representation, working with different layouts
Make the FileArrayAdapter to be independent of the external representation, working with different layouts
Implement Parcelable interface for ResourceLookup objects to be able to pass them between activities
Implement Parcelable interface for the ResourceLookupSearchCriteria objects to be able to pass them between activities
Add the "copy" constructor for ResourceLookupSearchCriteria
Fix bug with non-zero offset  in ResourceLookupSearchCriteria
Implement "endless" adapter for resource lookups
Upgrade Android Gradle Plugin to v0.12.2
Upgrade Android BuildTools to v19.1.0
Merge branch 'feature/newui' into develop
Add local .gitignore