fix defects - add uid
Merge pull request #254 from baev/defects-uid

fix - defects - add unique id for every defect (Closes #251)
update FAQ links. fixes #246
Merge pull request #255 from baev/update-faq-link

update FAQ links. Closes #246
Fixed Javadoc in Allure CLI
Fixed NPE in AllureCLI
Added behavior for missing input directories and XML files