Updates Start up instructions
Updates Start up instructions

* Updating start up instructions to be mostly commands the user can copy/paste.
* Changed the instructions to download the repo via git because it can be done on the command line. And if they have node.js installed, they 99% likely already have git.
* Modified the README syntax to use more Markdown instead of HTML.

PeerAcc34/SiaStone,PeerAcc34/SiaStone