WIP
docs(README): add link to changelog
docs(CHANGELOG): fix wrong links + add missing entry
chore(model import): remove unused check
fix(import): do not move flow nodes on lane import
test(layout): add sequence flow layout test
impr(lane resize): allow diagonal resize, fix boundary move

Changes:
- lanes may be resized diagonally, discarting the horizontal resize
amount
- boundary event is properly moved during resize of a lane / pool

Closes CAM-523, CAM-522, CAM-521
Merge branch 'wip-participant-layout' into develop
fix(scoll shape): scroll shape is updated on lane add
test(participant layout): Add missing testcase for participant resize feature
fix(participant layout): adjust bendpoints on lane resize

Implement bendpoint adjustment
- adjust bendpoints to retain the correct container relative positioning
- add utility methods and testcases

Fixes CAM-250
test(resize lane): check flow elements position after lane resize
fix(participant layout): fix unintended move

- fix unintended move during resize of a participant
- add test cases for the matter
- fix failing test case

Resolves CAM-492
test(resize lane): add position of flow elements after lane resize test
fix(content-type): associate bpmn extensions with xml content-type
chore(pom): uncomment tests module
update issue tracker
test(functional test): add project xml version 1.7
docs(CHANGELOG): Add version 1.6 and 1.7
test(functional test): Add template diagrams for UI test