cleanup etherlab: pep8, E251 unexpected spaces around keyword / parameter equals

cleanup etherlab: pep8, E225 missing whitespace around operator

cleanup etherlab: pep8, E303 too many blank lines (2)

cleanup etherlab: pep8, E231 missing whitespace after ','

cleanup etherlab: pep8, E271 multiple spaces after keyword

cleanup etherlab: pep8, E261 at least two spaces before inline comment

cleanup etherlab: pep8, E302 expected 2 blank lines, found 1

cleanup etherlab: pep8, W293 blank line contains whitespace

cleanup etherlab: pep8, E228 missing whitespace around modulo operator

cleanup etherlab: pep8, E401 multiple imports on one line

cleanup etherlab: pep8, E265 block comment should start with '# '

cleanup etherlab: pep8, W291 trailing whitespace

convert some etherlab source files to unix format

cleanup etherlab: pep8, E722 do not use bare except

Ignore cache files and generated test reports

Update Beremiz translations and list of translators

Added Turkish, Romania, Portuguese, Polish, Dutch, Hungarian.
Most existed translation are updated.