relationship and key purging
Merge pull request #18 from Bowery/sjkaliski-delete-graph-link

relationship and key purging
Update README.md
Different fix for failure handling with deferred
Changes from review.
add travis ci support
Merge pull request #20 from Bowery/sjkaliski-travis-ci

add travis ci support
fix travis
include build status in readme
Reformat catch block.
Merge pull request #19 from housejester/jde-future-fail

Fix so failure callbacks will be called.
Adds user-agent to request headers.
Make GraphBuilder _execute concat url and query string

GraphBuilder _execute was calling the _del with a query param, which
was refactored out because other callers had all been appending the
query to the url param before calling.
support multiple related parameters, closes #25
fix offset issue, closes #24
version bump
Merge pull request #27 from Bowery/sjkaliski-fix

fix offset issue, closes #24
Merge pull request #21 from housejester/jde-user-agent

Adds user-agent to request headers.
support pagination, closes #22

fix

fix
merge in #28 and version bump