[BugFix] getMemoryUsage()

Both getMemoryUsage() and formatBytes() need to be static for
getCounts() to return a value.
[BugFix] 2nd commit getMemoryUsage()

Forgot to include this line.
[BugFix] getMemoryUsage() - formatBytes cleanup
Merge pull request #2 from wells/bugfix/memory

[BugFix] getMemoryUsage()