Add the possibility to iterate over all language versions of the definitions

[dayures]

Originally reported by: larsgsvensson (Bitbucket: larsgsvensson, GitHub: larsgsvensson)

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Parrot offers the possibility to iterate over the labels in all languages. For truly multilingual ontologies it would be handy to have this feature for the definitions, too. My suggestion is to add the definitions/descriptions to LexicalInformation.

#!java

LexicalInformation.getDescriptions()
LexicalInformation.findDescriptionsByLocale( Locale locale ) 

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• Bitbucket: https://bitbucket.org/fundacionctic/parrot/issue/21