implement compile_po task to create require modules from po files

in fact, this is more general and can be used to compile the information
to any form that can be expressed with lodash/underscore templates.
support custom templates for compiled po target

See the new specs, how this can work. This enables to provide custom
templates to generate the modules by the user of the plugin.
Merge branch 'feature/po_to_module_task' into develop
bump version
Merge branch 'release/0.1.0'