Rules of thumb:
- glances.conf: this is the config file that comes with the source tarball.
  Touch carefully. Not for testing.
- glances-test.conf: this is the config file for testing purposes only.

Remove unused variables
No whitespace inside parentheses
Add missing whitespace around arithmetic operator
Fix indentation
Remove trailing whitespaces

Add steal time to the global CPU/per-CPU time accounting.
Add steal limits, alerts, and log support.
Update help screen.

Based on PR #309 by @pcn

Add missing files to MANIFEST.in
Better package structure
Better path handling