Merge pull request #375 from rjnagal/cpu

Add cpu frequency to machine info.
Check filesystem before accessing it in UI.

Fixes #377.
Simplify handling of progress bars and humanized values.

Fixes #378.
Merge pull request #380 from vmarmol/release

Check filesystem before accessing it in UI.
Merge pull request #381 from vmarmol/ui

Simplify handling of progress bars and humanized values.
Merge pull request #382 from rjnagal/cpu

Add cpu topology information to machine endpoint.
Merge pull request #383 from rjnagal/cpu

Add per-node memory information to machine endpoint.
Merge pull request #384 from rjnagal/cpu

Add cache info to machine topology
Add cgroup mount directory names to validate output.
Merge pull request #387 from rjnagal/validate

Add cgroup mount directory names to validate output.
Fix cgroup root path detection.
The current logic assumes that cpu cgroup mnt point is <basepath>/cpu.
On some systems, its <basepath>/cpu,cpuacct (CentOS 7).
Merge pull request #388 from rjnagal/validate

Fix cgroup root path detection.
Merge pull request #391 from rjnagal/cpu

Log one error message per hour for failing containers.
Add instructions for running cAdvisor on Boot2Docker.
Merge pull request #393 from rjnagal/cpu

Relax regex for kernel version string format in validator.
Merge pull request #394 from rjnagal/docs

Add instructions for running cAdvisor on Boot2Docker.