Don't even load mixpanel when we're not tracking

This is better for privacy (mixpanel doesn't even see that this user is
loading the client).
The app should still work when Mixpanel is blocked

If Mixpanel is blocked (by the browser, a proxy, or just because it's
down) the app would lock during login, requiring a reload (if
stay-logged-in-across-reloads was on) to use.  This change fixes that.
BTC bridge uses federation protocol

Strip out all the special-case code for the BTC bridge and just use
normal federation.  This allows the default bridge configuration to be
just a domain name instead of the full quote URL.
Allow the BTC bridge domain to be configured

Expose the setting on the options page.
[FIX] WC-1632: Bug fix on order book refresh when new currency selected
Add Account tab Carcase.
Balance: Add a space before question mark.
Merge pull request #1198 from singpolyma/mixpanel-tweaks

The app should still work when Mixpanel is blocked
l10n: Turkish country names.
l10n: Türk -> Türkçe. WC-1501.
Merge pull request #1200 from singpolyma/custom-btc-bridge

Allow the BTC bridge to be configured by users
[CHORE] Change fat finger margin multiplier: 2 -> 1.1
[CHORE] Fix copy on ripple name sign up
[BUG] Fix IE11 using a different path which makes its signature invalid. WC-1671

This is just a quick and dirty patch. I would write something better, but my
plane is about to start boarding. :)

You guys take it from here.
Merge pull request #1202 from justmoon/feature/fix_ie11

[BUG] Fix IE11 using a different path which makes its signature invalid
Tested and is working
[CHORE] update ripple-lib to top-of-tree develop
Merge pull request #1203 from geertweening/develop

[CHORE] update ripple-lib to top-of-tree develop
Support for federated login

Login information is already detected from the configured domain's
ripple.txt file.  This patch changes things so that if a username is
entered in "email address style" the auth information is detected from
the given domain instead of the locally-configured one.  This allows
users to easily choose alternative blobvaults without sacrificing client
support.