Latest jdk introduced bug that caused our unit tests to fail

See merge request !473

workaround for failing mvn testing call (https://stackoverflow.com/questions/50661648/spring-boot-fails-to-run-maven-surefire-plugin-classnotfoundexception-org-apache)

Resolve "remove IDE specific files from project"

See merge request !470

merge bug fixed

See merge request !471

changelog updated

See merge request !468

Resolve "Export of special characters"

See merge request !467

when pdf encounter SansSerif font it will embed custom font into a pdf that has support for unicode characters

Resolve "Going back to HomePage does not show the map (v12.1.0)"

See merge request !466

changelog updated for version 12.1.0~beta.3

See merge request !465

Resolve "upgrade 3rd party libraries"

Closes #538

See merge request !464