enable etherlab checks

resort enabled pylint check to move likely-most invasive changes to the end

clean etherlab: pylint, C0330 # (bad-continuation) Wrong hanging indentation before block

clean etherlab: pylint, W0612 # (unused-variable) Unused variable 'X'

clean etherlab: pylint, W1618 # (no-absolute-import) import missing `from __future__ import absolute_import`

clean etherlab: pylint,E0602 # (undefined-variable) Undefined variable 'X'

clean etherlab: pylint, E1136 # (unsubscriptable-object) Value 'X' is unsubscriptable

ignore missing MotionLibrary

to fix pylint error 'E0401 # (import-error) Unable to import 'X'

clean etherlab: pylint, E0611 # (no-name-in-module) No name 'X' in module 'Y'

clean etherlab: pylint, C0123 # (unidiomatic-typecheck) Using type() instead of isinstance() for a typecheck.

clean etherlab: pylint, W0104 # (pointless-statement) Statement seems to have no effect

clean etherlab: pylint, W0631 # (undefined-loop-variable) Using possibly undefined loop variable 'X'

clean etherlab: pylint, C1001 # (old-style-class) Old-style class defined.

clean etherlab: pylint, W0611 # (unused-import) Unused import X

clean etherlab: pylint, E0102 # (function-redefined) method already defined

clean etherlab: pylint, W0105 # (pointless-string-statement) String statement has no effect

clean etherlab: pylint,W0231 # (super-init-not-called) __init__ method from base class is not called

clean etherlab: pylint, C0412 # (ungrouped-imports) Imports from package X are not grouped

clean etherlab: pylint,W0108 # (unnecessary-lambda) Lambda may not be necessary

clean etherlab: pylint, C0411 # (wrong-import-order) standard import "import x" comes before "import y"

clean etherlab: pylint, W0404 # reimported module

check_source.sh: add E301 check to the list of selected PEP8 errors

clean etherlab: pep8, E301 expected 2 blank lines, found 1

clean etherlab: pep8, W503 line break before binary operator

clean etherlab: pep8, E266 too many leading '#' for block comment

clean etherlab: pep8, E122 continuation line missing indentation or outdented

clean etherlab: pep8, W191 indentation contains tabs

clean etherlab: pep8, E211 whitespace before '['

clean etherlab: pep8, E129 visually indented line with same indent as next logical line

clean etherlab: pep8, E127 continuation line over-indented for visual indent

clean etherlab: pep8, E129 visually indented line with same indent as next logical line

clean etherlab: pep8, W602 deprecated form of raising exception

clean etherlab: pep8, W601 .has_key() is deprecated, use 'in'

clean etherlab: pep8, E731 do not assign a lambda expression, use a def

clean etherlab: pep8, E203 whitespace before ','

clean etherlab: pep8, E712 comparison to True should be 'if cond is True:' or 'if cond:'

clean etherlab: pep8, E222 multiple spaces after operator

clean etherlab: pep8, E741 ambiguous variable name 'l'

cleanup etherlab: pep8, E306 expected 1 blank line before a nested definition, found X

cleanup etherlab: pep8, E305 expected 2 blank lines after class or function definition, found X

cleanup etherlab: pep8, E201 whitespace after '('

cleanup etherlab: pep8, E202 whitespace before ')'

cleanup etherlab: pep8, E227 missing whitespace around bitwise or shift operator

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.

Use the list of supported by app translations instead of supported translations by wx

This will make possible to translate application into locales, that
are not explicitly supported by wx: for example, 'pl' or 'bn_BD', 'bn_IN'.

Suppress message box in case current locale is unsupported or missing in wx

Beremiz can still be translated into it using own locales
available in './locale'.