Fix INSTALL.md

Added missing steps and missing deps.
Add link to INSTALL.md
Merge pull request #5 from spundun/master

Doc fix to INSTALL.md
Removed Reference to YakReader for master branch
Make chat info appear like a popup

Issue #2449
Remove unused namespace declarations
Namespace fixes
Merge pull request #7 from guardianproject/npex_work

Npex work
Merge remote-tracking branch 'origin/master' into paik