Fix concat.sh failure when building copay on Windows.
(and silent? bug in Linux builds - build.js attempts to cd to js/browser subdir, but there is no such directory in the copay project, and concat.sh resides in the project root)
Copyedit readme
This started out as spelling and grammar fixes, but a bit of structural editing crept in.  Please review and send feedback.
Merge pull request #268 from eordano/master

Minor spelling fixes in README.md
Merge pull request #264 from dthorpe/fix_concat.sh

Fix concat.sh failure when building copay on Windows.
Improve restore forms
STUN/TURN in default config
Replaced accordion by standard angularjs directives.
add lots of STUN/TURN servers
Fix #269: save wallet when restoring a backup
Merge pull request #276 from maraoz/add/stun-turn-config

STUN/TURN in default config
Fix typo and icons
fix config for TURN
Fix CSS for buttons
Signin page:
* Swap places for "join" and "create/open" (#285).
* Prevent the user not set the password and required fields (#280).
Fixes link and controller signin
Password required when create new wallet (#284).
Merge pull request #298 from cmgustavo/feature/01-signin-related

Feature/01 signin related
fix refresh button
Merge pull request #301 from maraoz/fix/refresh

fix refresh button
added an IOS image fix library