[Fix Bug] Enable ratio default when use global default.
[Fix Bug] Small bug in wizards.
[Fix Bug] For #1088, locale agggregation attribute.
Pep8.
Merge pull request #1095 from ismailsunni/pep8

Pep8.

I will merge it since it's only small change and I want to make jenkins sunny again :)
changed calculations in categorizing values
Make test pass.
Merge remote-tracking branch 'origin/develop' into develop
Mispelled.
Merge pull request #1096 from ismailsunni/develop

Fix failed test.

Small changes in test only.
Merge branch 'develop' of https://github.com/AIFDR/inasafe into proposed_computations_categorised_hazard_population
Translation file updates
Update translation.
[Wizard] Get global default and do not use value from metadata.
Merge pull request #1093 from ismailsunni/keyword_dialog

Keyword dialog.
Translation in keyword editor and wizard.
Merge branch 'develop' of https://github.com/AIFDR/inasafe into proposed_computations_categorised_hazard_population