Call install_* methods only once in spec_helper_acceptance
Don't support acceptance testing against apache on windows or osx
Call @proxy_set insteat of proxy_set in inline_template

This commit removes the following depreciation message:
Variable access via 'proxy_set' is deprecated. Use '@proxy_set' instead.
Merge pull request #816 from roidelapluie/Remove_Inline_Template_Depreciation_Warning

Call @proxy_set insteat of proxy_set in inline_template
Merge pull request #815 from justinstoller/maint/master/dont-install-multiple-times

Call install_* methods only once in spec_helper_acceptance