Switch to PHPUnit for tests
Rename test/ to Tests/ so PHPUnit finds them.
Let Travis run our tests
Add Travis build status and cleanup README

Wrap long lines, use better syntax highlighting, etc
Test Plan's total_billing_cycles

Also puts the assertion arguments in the expected order.
Merge pull request #66 from recurly/phpunit-tests

Switch to PHPUnit for tests
Include null attributes in XML

This will allow plan.total_billing_cycles to be changed to continuous
auto renewal.

Also changes the XML we generate to avoid empty tags favoring `<foo></foo>`
over `<foo/>`. This matches the sample XML in our docs.
Merge pull request #68 from recurly/send-null-attributes

Include null attributes in XML
Release notes for 2.2.3