Added a ad-hoc way of manually specifying primary keys for tables or
views. Useful for materialized views and views where the user know what
is a key
Merge branch 'bugfix/mappingProcessorIteration' of github.com:ontop/ontop into feature/viewKeys

This bugfix must be merged into the viewKeys branch, as otherwise the branch cannot be used on the mappings where it is needed
Added foreign key reading to the view key reader manual "fake" keys
Prints out all foreign keys to the console. Added a view_keys for the
testing.
Merge branch 'develop' of github.com:ontop/ontop into feature/viewKeys
Merge branch 'develop' of github.com:ontop/ontop into feature/viewKeys
Merge remote-tracking branch 'origin/develop' into feature/viewKeys
Removed printing of keys
Merge remote-tracking branch 'origin/develop' into feature/viewKeys
Moved the filename for view_keys from hardcoded to QuestPreferences
Added a preference for disabling the reading of view keys from file. Set
to default false
remove netbeans files
Merge remote-tracking branch 'origin/develop' into feature/viewKeys

Conflicts:
	reformulation-core/src/main/java/it/unibz/krdb/obda/owlrefplatform/core/Quest.java
	reformulation-core/src/main/java/it/unibz/krdb/obda/owlrefplatform/core/QuestPreferences.java
Consider the case in which we set the datatype for literal when we are
creating r2rml from obda
Merge branch 'feature/r2rml' of github.com:ontop/ontop into feature/r2rml
Merge branch 'develop' into feature/r2rml
Checking bug with date in r2rml
Changed class R2rml Parser to handle the case of templates and constants
with datatype literals
added support for typed literal in r2rml constants object
Merge branch 'develop' of github.com:ontop/ontop into feature/viewKeys