Use "All" as the default category for Google Analytics
Review changes
Merge pull request #141 from tigerpenguin/blee/google_analytics_category

Use "All" as the default category for Google Analytics
Add test for Google Analtyics when category is present. Move default category to a constant
Use Properties.category in ecommerce track calls
Follow Mixpanel App Links
Merge pull request #123 from segmentio/prateek/follow-app-links

Follow Mixpanel App Links
Update Changelog
[gradle-release-task] prepare release 2.4.6
[gradle-release-task] prepare for next development iteration
Contribution Docs
Merge pull request #142 from segmentio/prateek/contributing-docs

Contribution Docs
Tests for looking up which integrations are enabled in payloads
Merge pull request #143 from segmentio/prateek/payload-tests

Tests for looking up which integrations are enabled in payloads
Update Gradle Plugins and Wrapper
Consolidate Handler code
Move Tests into a sibling module, better IDE support and makes it easier to add instrumentation only dependencies
Merge pull request #144 from segmentio/prateek/tests

Move Tests into a sibling module, better IDE support and makes it easier...
Disable bytecode verification for tests and clean up dependencies.
Remove dependency on Tape and use QueueFile directly

Conflicts:
	core/src/main/java/com/segment/analytics/Segment.java