Update docs about purchasing imagery from google. (#233)
Update docs about purchasing imagery from google. (#233)

Merge from master to resolve #210.
google/earthenterprise,tst-ahernandez/earthenterprise,tst-lsavoie/earthenterprise,tst-ppenev/earthenterprise,tst-eclamar/earthenterprise,tst-ahernandez/earthenterprise,tst-mswartz/earthenterprise,tst-ahernandez/earthenterprise,tst-ahernandez/earthenterprise,google/earthenterprise,tst-ccamp/earthenterprise,google/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-ppenev/earthenterprise,tst-ccamp/earthenterprise,tst-lsavoie/earthenterprise,tst-ppenev/earthenterprise,tst-ccamp/earthenterprise,tst-ccamp/earthenterprise,google/earthenterprise,tst-ccamp/earthenterprise,tst-ccamp/earthenterprise,tst-ahernandez/earthenterprise,tst-lsavoie/earthenterprise,tst-lsavoie/earthenterprise,google/earthenterprise,tst-eclamar/earthenterprise,tst-eclamar/earthenterprise,tst-ahernandez/earthenterprise,tst-ppenev/earthenterprise,tst-ccamp/earthenterprise,tst-eclamar/earthenterprise,tst-lsavoie/earthenterprise,tst-ahernandez/earthenterprise,google/earthenterprise,tst-ahernandez/earthenterprise,tst-mswartz/earthenterprise,tst-mswartz/earthenterprise,tst-ccamp/earthenterprise,tst-ppenev/earthenterprise,tst-eclamar/earthenterprise,tst-eclamar/earthenterprise,google/earthenterprise,google/earthenterprise,tst-ccamp/earthenterprise,tst-mswartz/earthenterprise,tst-lsavoie/earthenterprise,tst-lsavoie/earthenterprise,tst-ppenev/earthenterprise,tst-ppenev/earthenterprise,tst-ppenev/earthenterprise,tst-mswartz/earthenterprise,tst-ppenev/earthenterprise,tst-mswartz/earthenterprise,tst-lsavoie/earthenterprise,tst-ahernandez/earthenterprise,tst-mswartz/earthenterprise,tst-eclamar/earthenterprise,tst-eclamar/earthenterprise