typo
enhancements in HTML site
proposal for common data modell of tag and branch
these references now doesn't hold information about their creation; this
information is stored in a referenced commit
fix coverity issues
Update README.md
CREATE SILENT instead of DROP + CREATE for empty graph
Merge branch 'master' of https://github.com/plt-tud/r43ples.git
Merge branch 'master' of local repository into common_branch_and_tag_model
created common model for tag and branch

merged also methods to create tags and branches to createReference()

createNewRevision() doesn't need a referenceName anymore since all
methods accept now both either a revisionNumber or a referenceName

modified getNewRevisionNumber in a way that it can detect itself if this
is a new branch

adapted several methods which used all changed methods

@stephanhensel: check if this fits also your needs
renamed test datasets and created new test queries
Update .travis.yml
Bugfix for "DROP GRAPH"

no additional execution of original query on SPARQL endpoint since the graph was alredy dropped by R43ples in purgeGraph()

additional comments included

@stephenhensel: does this fix #18 for you?
Merge branch 'master' of https://github.com/plt-tud/r43ples
added createTestDataset HTTP metod which creates a test data set

fixes bugfix in testing method
fix coverity issue
nice HTML frontend with CSS + jquery
small changes to html and css
refactor createtestdataset
Merge branch 'common_branch_and_tag_model'
added test resources