putting instructions in README-GENERATING-AGENT-SIMULATIONS.md; seems like a better place
adding a note about gcc and make
adding a note about request body text files
Merge pull request #78 from puppetlabs/PE-3832/reviewing_updating_puppet_gat_documentation

Pe 3832/reviewing updating puppet gat documentation
Merge branch 'master' of github.com:puppetlabs/gatling-puppet-load-test into dr_new_pe_builds

Sync with upstream master