make responsive for Term Useful Link area on Technical detail page
fix bug for responsive on Term useful link
fix bug for mobile version on technical detail page
make bootstrap tour for search page
add icon help for restart tour guide
add outline = 0 for css
fix bug for close button on the header
fix bug responsive for signin popup
make other account dont show signin popup
Merge pull request #108 from khoa-nd/master

Please pull the latest code