Add support for dynamically setting segment.io key.
update version for npm

We'll put this version on npm. Need to update version.
Merge pull request #330 from ryanxcharles/feature/bump-up-version

update version for npm -- Great!
Merge pull request #333 from matiu/bug/fix-tests

fix tests
Update README.md
Merge pull request #334 from matiu/bug/max-openfiles

add max open files
Merge pull request #335 from matiu/bug/add-limit-to-async

add concurrency limit
Merge pull request #336 from martindale/feature/analytics

Add Segment.io Config
Merge pull request #343 from matiu/feature/refactor-rpc-txs

Feature/refactor rpc txs
Merge branch 'master' of github.com:bitpay/insight into bug/block-reward