Modularize PHP installation + add tests
Use SCALR_USER constant in rrdcached install
Merge branch 'rrd-install' from @awheeler
Update sysctl kernel.msgmnb = 524288
Merge pull request #13 from Scalr/msgmnb

Update sysctl kernel.msgmnb = 524288
Merge branch 'modular' of https://github.com/Scalr/installer