[FEATURE] Delete account feature

Adds an account deletion functionality on security page.
Merge pull request #1769 from vhpoet/develop

[FEATURE] Security: 'Delete account' feature
[FIX] Currency diplay: Correctly display currencies throughout client
Merge pull request #1770 from yongsoo/fix/currency_display

[FIX] Currency diplay: Correctly display currencies throughout client
[FIX] Trust: Currency dropdown now only shows those with display true property
[TEST] e2e: Run protractor directly instead of going thru mochaProtractor

See @darkdarkdragon suggestion on https://github.com/ripple/ripple-client/pull/1766
Merge pull request #1772 from vhpoet/develop

[TEST] e2e: Run protractor directly instead of going thru mochaProtractor
Merge pull request #1771 from yongsoo/fix/currency_display

[FIX] Trust: Currency dropdown now only shows those with display true property