few mispelling errors
Merge pull request #345 from cgar/igor

few mispelling errors
Add Python Dev requirement
Fix CVS export [issue #348]

While I was there:
- complete overhaul of the CVS class
- fix open file issue w/ python3
- has_key() option was removed in python3
- usage simplified: there is no need to define the CVS filename, only the
  output folder, as for the HTML export
- update help, doc and man accordingly
- fix typos
Python 3.4

Python 3.4 is now supported.
Add Python 3.4 to .travis.yml.
psutil 2.1.1
Small fixes and improvements

README.rst: Add Slackware http://slackbuilds.org/repository/14.1/system/glances/
version 1.7.7