Check process isolation settings for tests
closes #1517
Initialize Agavi on demand when used with composer
closes #1518
Bump PHPUnit requirement to >= 3.7
closes #1519
Ensure all tests extend AgaviPhpUnitTestCase
Remove overwritten PHPUnit process isolation template

this is still mostly a big hack, but this time it should be a little more future proof to changes to the TestCaseMethod.tpl in PHPUnit
closes #1516
fix sample app tests broken by the default isolation change
refs #1515
Remove useless constructor (the parent constructor does everything already)
Remove custom command line argument parsing from test runner
closes #1514
run tests without and with isolation at travis ci