update version number and changelog

fix travis CI for deploying the build

Increase of majow version due to compatibility breaking removal of no…

…de and edge types from the interface.

Increase of database version due to interface compatibility preservin…

…g extension of the database model.

beta release

Increase of minor version due to compatibility preserving extension o…

…f the API.

Increase of minor version due to compatibility preserving extension o…

…f the API.

Increase of major version due to compatibility breaking change in the…

… API.

Initial SourcetrailDB Release

initial tag