Fixed: filtering takes in account the "definition" terms
Added location for each drug

HTML: Modified template for displaying a location for each drug. Added also a filter.
JS: Fixed a bug in name filtering and added the location filter function.
CSS: Minor fixes to display correctly the location
New template for adding or changing a remark.
Minor fixes
Added classes Location and Remark

Locations are now attached to a Drug and Remark to a BaseDrug. This to
protect the BaseDrug data for further checks and updates.
Simplified the "add" forms. Added the Remark form.
Registered classes Location and Remark.
Added Location and Remark fields and views.

Also simplified the imports.
Added localization settings and splitted database settings
Renamed files
Changed naming (dotation>allowance, drug>medicine)
Added internationalization
Added a module to import/export an allowance