docs(time and date fields): demo and exercise docs
docs(pagination): add demo and exercise docs
docs(widgets_with_holes): update demo and exercise docs
docs(tooltip): fix typos
style(tabs, accordion): prefix controller names, add Controller suffix
fix(alert, collapse): remove replace:true
refactor(*): move widget templates to widget's root directory
refactor(*): remove .tpl part from directive template file names
run karma in background process, pipe the stdout together