Merge branch 'develop' of https://github.com/pgmodeler/pgmodeler into…

… develop

Updates on CHANGELOG.md and RELEASENOTES.md

Merge branch '0.8.0-beta2' into develop

Minor update on RELEASENOTES.md and CHANGELOG.md

Merge branch 'model-db-sync' into develop

Update on CHANGELOG.md and RELEASENOTES.md for 0.8.0-alpha2

Fix the bug on constraint editing form that no show the reference table

columns (issue pgmodeler#522)

Merge branch 'faithful-elephant' into develop

Merge branch 'develop'

Updates on README.md and CHANGELOG.md for release 0.7.2-beta1