Remove unused variables
Diagnostics, severity, app type, custom user data
Remove spurious close tags
Attempt to fix tests on php5.2 and 5.3
Fix automatic severity setting, add tests for that
Support passing severity into manual notifications
Allow chaining of setters, update docstring
Type hinting, more tests
Test helpers
Only use array_merge if both are arrays
Remove type check and hinting
Remove duplicate code
Fixed default severities, some null values
Merge pull request #21 from bugsnag/user-and-type-support

Diagnostics, severity, app type, custom user data