remove border radius from content.
walkthrough now runnable in the middle of editing

history.toJSON and .fromJSON are now split out of.
history.save and .restore.
re-enable connection after walkthrough
Hardcode ctrl-shift-z -> ctrl-y for windows
fix tests. Modals transition out
update sprite.
Loding indicator for tag reference (#1161)
Don't show reference until image is loaded or errored
Missed a const in d0667e
Translatable documentation, Fixes #1108

* Adds Marked
* Fixes a global leak in toGeoJSON
* Removes marked from package.json
* Adds documentation to core.yaml
Translatable documentation, Fixes #1108

* Adds Marked
* Fixes a global leak in toGeoJSON
* Removes marked from package.json
* Adds documentation to core.yaml
* Removes stray console.log from tests
Merge branch 'master' of github.com:systemed/iD
improve walkthrough outro

fixes #1151
Pagination for help contents
Merge branch 'master' of github.com:systemed/iD
Add classes to walkthrough tooltips
style adjustments to walkthrough.
Fix tagreference, fixes #1160
Merge branch 'master' of github.com:systemed/iD
only highlighted window is clickable

during the walkthrough