update README
add rJava url
Testing finished
Merge branch 'CalendarRefactoringTL'
Removed files for removed classes
TimeUnit no longer provides DateFormats but formats Dates itself

Thus, the internal implementation can be different.
format quarter TimeUnits using custom Java code
Enable to get the model information criteria for a SARIMA model.

Added a class containing this information criteria and a function in the
RsarimaModelProvider to get this class for a specific model.
Added MEMuRY and POTSBLITZ prototypes
add logo & paper link to ReadMe
Merge branch 'master' into CalendarRefactoringFU
CalendarRegistry:
removed commented out code
added a javadoc to initialize()