Prepare release v0.9.2

Updated publishing gradle script

Merge remote-tracking branch 'origin/master'

* Enhancement Swagger2Markup#26 and Swagger2Markup#27: Added a pre-pr…

…ocess hook to modify a Swagger Model before it is converted.

Workaround: If the type of a BodyParameter is String and not a Model,…

… the schema is null and lost. Therefore the fallback type of a BodyParameter is String now.

Added possibility to write object definitions to separate files. Issue …

…Swagger2Markup#19

* Swagger License is not mandatory anymore

* Updated markup-document-builder from v0.1.3 to v0.1.4

Merge remote-tracking branch 'origin/master'

Merge remote-tracking branch 'origin/master'

Merge remote-tracking branch 'origin/master'