use build source dir env variable

add tests for Feature/Scenario Hooks with context parameters (#925)

Update for 2.2 release

update changelog for 2.2.0-prerelease20170523

update TestGenerator version

Update changelog and format release date in ISO8601

update changelog.txt

add bin and pdb to build artifacts

fix specflow.nunit package dependency

VS2010/VS2012: Test class generation fails when installed SpecFlow an…

…d SpecFlow.CustomPlugin packages in one project (Issue 279)