chore: fixed splash screen
chore: added specs to be filled later

* feat: reworked atlas selector

* bugfix: maptoproperty

* [skip ci] add spec files

* fix failed test

* fix tests

* chore: update atlas query

* chore: implement parcellation on top level atlas
chore: add preview url

add travis ci

chore: minor refactor

chore: handling ie syntax error

feat: introducing other color maps than jet

chore: slight tweak on how shader generation

This reverts commit 3ae1fda1.

chore: renamed css class for consistency

chore: streamlined dataset action btns

fixes #502

chore: added toggle axis in user doc
chore: updated big brain origin dataset
bugfix: encode uri for dataset preview

chore: use constant for aria labels

fix: minor fix of backend_url logic