This enables NetBSD and DragonflyBSD as well (maybe someday).

psutil >= 3.3.0 is required.

Remove 'glances_' prefix from filenames.

- First line should end with a period
- No blank lines allowed after function docstring
- 1 blank line required between summary line and description
- 1 blank line required before class docstring
- Multi-line docstring closing quotes should be on a separate line
- No whitespaces allowed surrounding docstring text
- One-line docstring should fit on one line with quotes
- Use r""" if any backslashes in a docstring

A setter method always takes a parameter and does not return a value.

Rename 'set_stats_snmp' method to 'get_stats_snmp'.

Display 64bit every time on 64bit environment and fix the display of io read/write (issue #469 Thk to Sylvain Mouquet)

Display 64bit every time on 64bit environment and fix the display of io read/write (issue #469 Thk to Sylvain Mouquet)

Display 64bit every time on 64bit environment and fix the display of io read/write (issue #469 Thk to Sylvain Mouquet)

On Synology DSM OS (Linux base), python throws an IOError when open does not find a file.
Previously only OSError was handled, now it handles both the OSError and IOError.

Python's platform.linux_distribution() returns an empty tuple if a Linux
distribution is not part of the '_supported_dists' list.

Add a method to parse the os-release file, the new standard release file,
which replaces the multitude of per-distribution ones.

Also, platform.linux_distribution() is being deprecated and then removed
in future Python releases.

One-line docstring should not occupy 3 lines
Expected 1 blank line *before* class docstring
First line should end with '.'
Blank line missing between one-line summary and description
No blank lines allowed *after* method docstring
Use r""" if any backslashes in a docstring

Use CapWords convention for class names
Use new-style classes
Use lowercase with underscore for function and local variable names
(to be continued)

Use format() instead of % method.

- remove obsolete code
- glances_password: update comments and fix typos
- re-apply fix to avoid string format conflicts (screwed up after
  feature branch merges)
- strip trailing whitespaces
- flake8

Add args visibility to the plugins to handle with the SNMP server properties (address, community...)