Fixed set_cookie max-age parsing

Max-age is expected to be in seconds and thus cannot be parsed by _since_epoch.
Expire attribute is calculated from now() and max-age
Merge branch 'Fixed_attribute_maps'
Merge remote-tracking branch 'origin/master'
EOL replacement in certificate read

EOL are replaced in reading the certificate before the split.
Fixes error when certificate has windows EOL.
Merge branch 'Cert_fix'

EOL in certificate fix
Removed lower from AttributeConverter

Lower() removed in AttributeConverter methods from_dict and adjust
AttributeConverters should respect the case in the attribute names
according to specifications.
Merge branch 'AttributeConvertors'
Fixed Attribute_converter

Fixed to_ method as well
Merge branch 'AttributeConvertors'

Merged fix from AttributeConvertors
Merge remote-tracking branch 'origin/master' into HEAD
Fixed remaining part of the Attribute converters

Fixed test_19... to the updated behaviour
Merge remote-tracking branch 'origin/master'
Merge branch 'AttributeConvertors'
PEP-8
PEP-8
No index must be signaled using None.
Fixed some tests.
Release 2.1.0
Release 2.1.0
Removed lower from AttributeConverter

Lower() removed in AttributeConverter methods from_dict and adjust
AttributeConverters should respect the case in the attribute names
according to specifications.
Tests modified for these changes