[FIX] Show error msg when insufficient XRP to send

If the user does not have enough XRP and there are no alternative paths,
an informative error message is displayed.
[FEATURE] Export history as a .csv

Add required dependency to support download in IE
[FEATURE] Export history as a .csv

Copy downloadify.swf to swf dir (required to support download in IE)
Merge pull request #1495 from bss-/downloadify-dep

Downloadify swf required for "Export to CSV" button on IE
Merge branch 'develop' into release
[FIX] Send URI is defaulting to XRP (not the correct currency) (RT-2060)
[FIX] UI Cleanup: Total balances styling changes
-Consistent on decimal points: XRP and XAU show 4 decimals point and others show 2
-Visual styling of the amount cleaned up
[TASK] bump ripple-lib to 0.8.1
[FIX] index.html: add meta tags
[TASK] make me a webmaster
[FIX] UI Cleanup: fix alignment of 'Export to CSV' button
[fix] fix develop branch
[FIX] Address pull-request comments

-Store ($scope.aggregateValueAsXrp / metric) in a variable to improve readability
Merge pull request #1509 from mrajvanshy/totalBalanceColor

[FIX] UI Cleanup: Total balances styling changes
[FIX] Clearer text than "offline" and "loading.."
[FIX] Path finding stopped working with gateway account (RT-2218, RT-2215)

* Specifying every currency/issuer pairs with positive amounts only while
  doing path-finding.
* Allow issue currency when the currency has both positive and negative
  components.
* Fix path displayed as n/a.
  (related to "Selected currency should be the first option")
* Fix a bug when exchanging currencies without full names.
[TASK] Put advanced_feature_switch to config example file
Merge pull request #1519 from vhpoet/afs

[TASK] Put advanced_feature_switch to config example file
Merge pull request #1513 from annatonger/fix/metatag

[FIX] index.html: add meta tags
[FIX] URI: Default amount to one billion in advanced setting