First pass at adding array support to ESJsonEncoder.
All field types now support arrays in ESJsonEncoder.
Removed reflection from writeRawArrayField.
Replaced writeRawArrayField with generic writeField.
Added tests for raw fields
Version bump to 0.7.0 on dev branch after cutting versions/0.6
release branch.
Move exports out of build.sh into env.sh

Set env variable in build.sh to control number of concurrent make jobs
Add UdpOutput.
Merge pull request #949 from ecnahc515/separate_env_from_build

Move exports out of build.sh into env.sh
Merge pull request #950 from mozilla-services/udp-output

Add UdpOutput.
Writing raw String and Bytes fields will now work with arrays.
Renamed writeRawField to writeIntField.
envversion is now written with writeStringField.
Updated changes file to reflect that ESLogstashV0Encoder was updated as well.
Issue #948 Add process message failure monitor
Merge pull request #952 from mozilla-services/issue_948

Issue #948 Add process message failure monitor
Resolved all superficial race conditions exposed by running the plugin
tests using the `-race` flag.
Merge pull request #954 from mozilla-services/plugin-test-races

Resolved all superficial race conditions exposed by running the plugin
Small foRunner code change and significant restructuring of
StatAccumInput tests to remove all race conditions from the pipeline
package tests.
Merge pull request #932 from ianneub/ESJsonEncoder_array

Added string array support to ESJsonEncoder
Issue #958 Add a field existence check to the message matcher
Merge pull request #959 from mozilla-services/pipeline-test-races

Fix pipeline test race conditions
Merge pull request #961 from mozilla-services/issue_958

Issue #958 Add a field existence check to the message matcher