Merge branch 'release/0.1.19' into develop
#121 rest endpoint is now relative
#121 overriding configuration file

the configuration file name can be specified (optionally) in context.xml as parameter "configurationFilename"
new scenarioo version 0.1.20

config file can now be specified to be different from config.xml in order to
allow multiple scenarioo instances on the build server (develop and master)
Merge branch 'release/0.1.20' into develop
Update README.md
Merge branch 'develop' of https://github.com/scenarioo/scenarioo into develop
Merge branch 'develop'