[bugfix] Fix session_affinity none handling (cloudflare#179)

Fix Travis CI key.

[build] Build flarectl binaries via Travis (cloudflare#152)

[flarectl] Adds User-Agent blocking to flarectl (cloudflare#145)

[build] Update Go versions in Travis, remove static 1.7.x check

[feat] Load Balancers, User LB Monitors, User LB Pools (cloudflare#142)

* [feat] Load Balancers, User LB Monitors, User LB Pools
* Fix validation error modifying load balancer with automatic TTL
* Support organization-level Railguns & Load Balancers

Implemented by creating the API object with an 'Organization' option.
The supposition is that API users probably only care about updating
zones within a single scope, so creating separate APIs for both
organization and account is unnecessary.

OriginCACertificate.RequestValidity should be an int

Implement ListOrganizations

Signed-off-by: Gábor Lipták <gliptak@gmail.com>

Merge pull request cloudflare#98 from cloudflare/jamesog/97-updatedns…

…record

Bugfix for UpdateDNSRecord

Merge pull request cloudflare#84 from benjojo/ServiceFailureError

Handle API backend failures with a better error message (cloudflare#83)