Use memory_info instead of memory_info_ex. Use memory_full_info with USS and PSS for the top process (extended stat) (related to issue#797)

See https://github.com/nicolargo/glances/issues/546#issuecomment-175272479

This reverts commit eee6dd6d, reversing
changes made to dbb97a53.

Remove 'glances_' prefix from filenames.

- import statements are in the wrong order.
- missing whitespace around arithmetic operator
- blind except: statement
- multiple imports on one line
- trailing whitespace
- blank line contains whitespace
- line break before binary operator
- missing whitespace after ','
- block comment should start with '# '
- multiple spaces before operator
- 'logger' imported but unused
- expected 2 blank lines, found 1

- 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

Introduce the new sort_key method. Replace the old multitude ones,
thanks to properties too.

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

Rename 'set_stats_snmp' method to 'get_stats_snmp'.

- Remove unused import
- Fix double import
- Remove unnecessary pass statement
- Fix bad indentation
- Fix pointless statement

glances_globals <-> glances_logging

glances_globals -> glances_logs -> glances_processes -> glances_globals