README update, to cater for new users
README update, to cater for new users

* Expanded a bit on the high level project description
* Added a section giving a high level architecture overview
* Added some more details on dependencies
* Renamed debian package -> deb package

kidaa/helios,gtonic/helios,udomsak/helios,stewnorriss/helios,dflemstr/helios,mattnworb/helios,skinzer/helios,skinzer/helios,stewnorriss/helios,gtonic/helios,skinzer/helios,DagensNyheter/helios,mattnworb/helios,mavenraven/helios,spotify/helios,molindo/helios,kidaa/helios,spotify/helios,molindo/helios,gtonic/helios,stewnorriss/helios,molindo/helios,udomsak/helios,mavenraven/helios,spotify/helios,kidaa/helios,DagensNyheter/helios,mavenraven/helios,mattnworb/helios,udomsak/helios,dflemstr/helios,DagensNyheter/helios,dflemstr/helios