index.html: Open a new tab on CTRL click
index.html: Open a new tab on CTRL click

On clicking the projects or mentors or FAQ tab
while holding the CTRL button, the page must
appear in a new tab on the browser.

Fixes https://github.com/coala/projects/issues/229

coala/projects,coala/projects,coala/projects,coala/projects,coala/projects