Adding a warning when Xowl is not installed. Also, deleting a row in the Config table when uninstalling Xowl.
Deleting some unuseful classes for ximTAGS module.
New entry on Namespaces table for the OntologyBrowser
Merge branch 'develop' of https://github.com/XIMDEX/ximdex into feature/xtags-review
Recovered RelTagsDescriptions files
Fixing comments
Adding full schema.org ontology
Adding selectors to navigate over schema.org taxonomies
Merge branch 'develop' of github.com:XIMDEX/ximdex into feature/xtags-review

* 'develop' of github.com:XIMDEX/ximdex:
  Adding support to hidden nodes
Fixes tags input widget to be instantiate twice in the same action
Fixes new tags to be added in other tab taglist when there are more than one tags tab opened
Merge branch 'feature/xtags-review' of https://github.com/XIMDEX/ximdex into feature/xtags-review
Fixes document tag list cannot be persisted with no tags
Showing elements in OntologyBrowser widget with no childrens
Merge branch 'feature/xtags-review' of github.com:XIMDEX/ximdex into feature/xtags-review

* 'feature/xtags-review' of github.com:XIMDEX/ximdex:
  Fixes document tag list cannot be persisted with no tags
  Fixes new tags to be added in other tab taglist when there are more than one tags tab opened
  Fixes tags input widget to be instantiate twice in the same action
  Recovered RelTagsDescriptions files
Adding multi-tab functionality in OntologyBrowser
Puts back to suggested tags list the tags being removed from selected list
Minor issue
Merge branch 'feature/xtags-review' of https://github.com/XIMDEX/ximdex into feature/xtags-review
Changing button for anchor in main-action - OntologyBrowser