v0.6.0

Features:

• Custom error pages (#2)
• AngularJS 1.5.7 (#17)

Fix:

• #4
• #34
• urlParams Angular Service ( biigle/volumes#10 )

Changes:

• Label tree description can now be cleared
• Global keyboard events are only handled if no input element is selected
• Speed up Gulp build
• If a transect to detach does not belong to the project, a 404 is returned instead of a 403