Update CONTRIBUTING.md
Update CONTRIBUTING.md

Release pull-request
Merge pull request #53 from EricpolUkraine/development

Release v9.1 pull request
14.05.2014 issue #14. validation when creating bt over absence.
issue #14 small fixes in queue
Merge pull request #55 from nazariitashak/development

Pull request for issue #14
Merge pull request #60 from AnnaStorozhenko/master

PU / Employees / [Add employee] enhancement #52
custom web server error page was added.Global ExceptionHandling was created.Error controller,view was added.
Merge remote-tracking branch 'upstream/development' into development

Conflicts:
	AjourBT/AjourBT.csproj
Merge pull request #63 from nazariitashak/development

According to issue #56 Customize web server error pages was implemented.
Merge pull request #64 from EricpolUkraine/development

Merge of v1.9.2-alpha to 'test' branch