[FIX] validators: fix incorrect return value on rpMasterAddressExists
Merge pull request #1308 from shekenahglory/master

[FIX] validators: fix incorrect return value on rpMasterAddressExists
Merge branch 'release'
Merge branch 'release'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'release'
[FIX] Clear scope on logout
Merge pull request #1380 from vhpoet/hotfix

[FIX] Clear scope on logout
Merge branch 'release'
Merge branch 'release'
[FIX] Empty Balance Change descriptions
[TASK] Announcement banner: Add notice about trustlines -> gateways
Merge branch 'release'
Merge pull request #1438 from yongsoo/task/info_banner

[TASK] Announcement banner: Add notice about trustlines -> gateways
Merge pull request #1447 from shekenahglory/release

2FA: correctly populate country code from authy dropdown
[FIX] Add link into gateways page announcement
Merge pull request #1449 from annatonger/fix/bannertext

[FIX] Add link into gateways page announcement
[FIX] Space on unfunded accounts banner
[FIX] Fix currency choice restriction with federation.

Previously the account_currencies restriction would overwrite any federation currency restriction. This patch implements the correct behavior where the Ripple network currency restrictions are intersected with the federation restrictions.

Also adds a loading message while currency restrictions are being determined.

Fixes a race condition where an old account_currencies request can succeed later, even if the destination has since changed.