Implementation issue #878 ok for the curses interface. To be done in the WebUI and code should be optimized

Workaround for psutil#742.

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)

Fix bug introduced in commit e350cb5b.

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

This reverts commit eee6dd6d, reversing
changes made to dbb97a53.

Remove 'glances_' prefix from filenames.

...otherwise kernel threads will be highlighted too.

- 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

Display a leading zero if the number is only one digit long (00-59).
Display minutes in one digit otherwise (mm:ss.ms format, 0-59).

- Attribute 'tag_proc_time' defined outside __init__
- Catch the correct exception (OverflowError)
- Display '?' if no CPU times are available