fixed utilization calculation. 

Utilization report of the SRs were off by 2 decimal places. Removed the * 100 to sr.physical_size.to_f in order to line up the SR utilization numbers with XenCenter utilization.
Update xenserver_vm_create.rb added param -j, --json-attributes
Merge pull request #12 from laboshinl/master

Update xenserver_vm_create.rb added param -j, --json-attributes
Merge pull request #11 from elvin159/fix-utilization-report-in-sr-list

fixed utilization calculation.
update gem deps
bump version to 1.4.0
update homepage, bump version
Add option to set environment on vm create
Merge pull request #14 from szechyjs/master

Add option to set environment on vm create
updated fog deps to ensure broken fog 1.19 is not used
bump version to 1.4.2