Make ttx silent with -q option

Use davelab6/fonttools.git
Minor: add default-jdk to Debian install steps
Fix ba9ae80ffc76b5235e649fffa6390c21a674abd2 to use <input> not <button> for multi-submit form
Add comments to requirements.txt about git packages
Merge branch 'master' into silent-ttx
Merge pull request #179 from xen/silent-ttx

Silent ttx