Update INSTALL.md

While following your guide I received "Unable to locate package ntpd"

I googled and found that apt-get ntp works instead.
Merge pull request #17 from MSauce/patch-1

A few simple corrections to Install Guide
add contributors section to readme
fix license
clarify bitcoin.conf settings in install
more sustainable contributors reference
add install docs, better config.json fail message
Fix for uglify for password stength
add password strength to all.js
slimmer dashboard info for receive/send
Fix browserify, add template caching
queue up weighted prices requests
precache view templates on initial load
intial work to improve the mobile interface
we're not going to support IE < 10
clean up, unminify, and update js
implement pure-html5 qr code scanning for send
QR code scanning, pure HTML5, it works, game changer people
some fixes to the install
SSL/HTTPS support