Merge branch 'release/v0.3.1' into develop
refactor filter

apply isNotFuzzy filter more early, less cycles spent in loop
refactor isTranslated filter

apply filter more early to save some cycles in the element loop
filter out obsolete items from catalog

such items should not be in any catalog. In the real world, such items
won’t have a module extracted by create_pot (that’t why those strings
have been marked obsolete). They would clutter up the log with warning
messages.
force pofile version to 0.2.7 or later

the obsolete attribute has been added with 0.2.7 release of pofile.
Since we now rely on this feature, we need to adjust the dependency.
update peerDependency to grunt

we don’t require grunt to be a specific version. 0.4 line is okay. This
should unbreak a few installations.
bump version and release history
Merge branch 'release/v0.3.2'