Strip white-space from Attributefields

Fixes adagios issue 188
Parsers.config - improve error message in parser
documentation - unset examples
Update CHANGES
Add guess_nagios_directory for finding nagios install dir
Reformat file, spacing, line break before def and variable naming
Updated relevant files to version 0.5.0
Automatic commit of package [pynag] release [0.5.0-1].
Merge branch 'master' of github.com:pynag/pynag
doctest fixes
test nagios.cfg now references status.dat