typo
Update README.doc to fix spelling error
suse platform: read /etc/SuSE-release only once.

doing it twice is (slightly) inefficient and complicates the tests
[OHAI-339] distinguish openSUSE from SUSE Linux Enterprise

- platform_family: stays "suse" for both
- platform: SLE, being the more stable platform,
                 gets to keep platform "suse"
            openSUSE is now platform "opensuse"
- platform_version: is "MAJOR.MINOR" even for SLE which officially is
                    versioned as "MAJOR [SP MINOR]"

I considered to change the platform only for *future* openSUSE
versions (12.3 or later) but decided against it: "suse" >= 12 would
then conflict with a future SLE 12 (scheduled for 2014).
add root_group plugin
Merge branch 'OHAI-428'
OHAI-428: Limit root_group unit tests to their own platform
adding support for GCEL which is kinda ubuntu
Merge branch 'OHAI-450'
add google compute engine as cloud provider
this will be easy to mock while testing
no userdata metadata field is present
no need for readonly response,
specs for gce
Merge branch 'OHAI-444'
change log level info to debug
OHAI-433: Update tests for reduced network logging level
[OHAI-430] - detect LinuxMint w/ LSB
add cpu counts for darwin
Merge branch 'OHAI-279'