[Invoke task] New module boilerplate

[khorolets]

• Closes [Invoke task] New module boilerplate #63: [Invoke task] New module boilerplate
• Add boilerplates task namespace with crud_module task to create simple CRUD module.

Usage is invoke app.boilerplates --name=articles --singular=article

Templates for a new module are in tasks/app/boilerplates_templates/crud_module in txt format. They are rendering with Jinja2, it allows us to avoid additional dependencies.

After CRUD module is created a little reminder appears with info about adding the module to ENABLED_MODULES and where to find the sources.

[coveralls]

Coverage remained the same at 94.175% when pulling 958ea16 on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[coveralls]

Coverage remained the same at 94.175% when pulling 68625e8 on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[frol]

Multi-word module names are not supported, right?

[frol]

Use comma instead of percent (%) in logging.

[frol]

Let’s use .py.template extension instead of .txt

[khorolets]

@frol Right, only if you separate words with dash or low-dash.

[frol]

Using dashes or underscores in the name will break class names...

[coveralls]

Coverage remained the same at 94.175% when pulling da4e4fc on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[khorolets]

@frol, I've missed that case. How you prefer to handle it?

[frol]

First of all, I would use more specific template variables instead of inline modification inside the templates, i.e. module_title, model_name. Module title is a capitalized module name with underscores replaced with spaces. Model name is a capitalized singular form of module name without spaces (I would replace _ with spaces -> capitalize -> drop spaces).

[khorolets]

OK, I'll update my PR.

[khorolets]

@frol, I've updated my PR, please review.

[coveralls]

Coverage remained the same at 94.175% when pulling 5b1402c on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[coveralls]

Coverage remained the same at 94.175% when pulling 1f7cf42 on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[coveralls]

Coverage remained the same at 94.175% when pulling f58590d on khorolets:issue-63_new_module_boilerplate into 1067b18 on frol:master.

[coveralls]

Coverage remained the same at 94.175% when pulling 0d277c4 on khorolets:issue-63_new_module_boilerplate into 9bb78ac on frol:master.

[coveralls]

Coverage remained the same at 94.175% when pulling 0e47488 on khorolets:issue-63_new_module_boilerplate into 9bb78ac on frol:master.