Merge pull request #1822 from iandees/new-presets-1

Add a couple presets
Add straighten way operation and action
Merge pull request #1826 from paulmach/straighten

Add straighten operation and action
Build translation
Better orthogonalization of skinny quads. Fixes #1812
Add stop sign preset and backrest field
Merge pull request #1834 from kreed/presets

Add stop sign preset and backrest field
Merge pull request #1831 from paulmach/issue-1826

Better orthogonalization of skinny quads. Fixes #1812
Minor tweaks to style of test
Make straighten/orthogonalize act like a single operation

- Display only one or the other in the radial menu
- Rename "Orthogonalize" to "Square"
- Use "S" as shortcut for both

Refs #1839
Added the ability to load points from gpx files and display on the map
Clean up
Update togeojson.js to 0.3.0
Don't auto-save intro tutorial edits

Fixes #1745
Fixes #1795
Update imagery
Update translations
1.2.0
Start FAQ
Can I use iD offline?
Add office to area list (fixes #1784)