ability to create multipolygons
handle extending multipolygons with multiway rings
add multipolygon creation tests
expose relation.joinMemberWays
Merge branch 'master' of github.com:systemed/iD into create-multipolygon
updated path preset:
* added new sac_scale, incline and trail_visibility fields
* added ref field
* removed oneway and maxspeed field
this should better reflect how highway=path is used.
See: http://taginfo.openstreetmap.org/tags/highway=path#combinations
Merge pull request #1352 from tyrasd/master

inline "taginfo" help broken on "additional tags"
Merge pull request #1356 from tyrasd/path_preset

updated path preset:
Avoid _.bind

Seeing some weird object retention behavior with it.
Translate 'Search' (fixes #1358)
Fix saving taglist changes

issue #1295
fix turning off tiger overlay, fixes #1349
fix #1362
Remove combobox.html
fix tram icon
fix line preset icon offset
Create a dist directory

This directory will contain the built sources (iD.js, iD.css)
and images. On a release branch, we will check in the generated
files. For the osm.us/master deploy, it should run make and use
dist/ as the root.

Paths in css are relative, e.g. url(img/foo.png).
Update build/install directions
Clean up Makefile
Omit changeset comment if empty (fixes #1360)