re-enable ui sub-module
use Pattern object in PatternParameter
update maven dependencies
restructure Vaadin maven project
remove trailing slash (/)
load extra schema declarations from file
TripleReaders to decouple reading from files
schema cache uses TripleReaders
Use TripleReaders for tests
TripleWriters to decouple writing from files
use filetype in TripleFileWriter
rearrange Utils classes
Add a string writer
rename package
ui skeleton
gather all services in services package
rearrange imports
configuration class and some rearranging
create DatasetSource on access
Merge branch 'master' into dev