Updated README.md with Install Instructions
Updated README.md with Install Instructions

Added additional supported operating systems and added a link to the fusion/earth server install documentation.
tst-ppenev/earthenterprise,tst-ahernandez/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,google/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,tst-lsavoie/earthenterprise,google/earthenterprise,tst-eclamar/earthenterprise,tst-ccamp/earthenterprise,tst-ppenev/earthenterprise,tst-ppenev/earthenterprise,google/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,tst-ccamp/earthenterprise,tst-ahernandez/earthenterprise,google/earthenterprise,tst-lsavoie/earthenterprise,tst-ppenev/earthenterprise,tst-ccamp/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,tst-ccamp/earthenterprise,tst-lsavoie/earthenterprise,tst-eclamar/earthenterprise,tst-ahernandez/earthenterprise,tst-lsavoie/earthenterprise,tst-ahernandez/earthenterprise,tst-ahernandez/earthenterprise,tst-ahernandez/earthenterprise,google/earthenterprise,tst-mswartz/earthenterprise,tst-ppenev/earthenterprise,tst-lsavoie/earthenterprise,tst-ccamp/earthenterprise,tst-ahernandez/earthenterprise,tst-ppenev/earthenterprise,google/earthenterprise,tst-lsavoie/earthenterprise,tst-ppenev/earthenterprise,tst-ccamp/earthenterprise,tst-ahernandez/earthenterprise,tst-ppenev/earthenterprise,tst-mswartz/earthenterprise,tst-ahernandez/earthenterprise,tst-eclamar/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,tst-lsavoie/earthenterprise,google/earthenterprise,tst-eclamar/earthenterprise,tst-mswartz/earthenterprise,google/earthenterprise,tst-lsavoie/earthenterprise,tst-ccamp/earthenterprise,tst-ppenev/earthenterprise