[FEATURE] Test initialization of RippleAccountActivityMonitor.
Merge branch 'develop' of github.com:ripple/gatewayd into develop

Conflicts:
	package.json
Merge branch 'develop' of github.com:ripple/gatewayd into develop

Conflicts:
	package.json
[TEST] HTTP Errors for /payments/failed/:id/retry
Merge pull request #174 from ripple/ripple-rest-integration-issue_currency

Ripple rest integration issue currency
Merge branch 'develop' of github.com:ripple/gatewayd into develop
[TEST] POST /withdrawals/:id/clear fails properly.
[TASK] Be explicit with null as callback response.
[TEST] Cleanup url string.
Merge pull request #175 from ripple/test-http-retry-failed

Looks good to me.
[TEST] Use best practices.
Merge pull request #177 from ripple/test-http-clear-withdrawal

Looks good to me
[FEATURE] replace ripple-lib implementation with ripple-rest-clinet
[TEST] refund cold wallet
[TASK] add extra line
[TASK] insatiate ripple-rest-client with secret
[TASK] update cli to take options
[TASK] update ripple-rest-client version
[TEST] pass options argument