www: Moved prefix form defs. to separate template

Moved the prefix form definition from the prefix add-template to a
separate template to prepare for re-use in an angularified prefix
edit-template. Prepared the controller & template by adding a variable
to the $scope to let the template know wherher it's used on an add- or
edit-page.

Refactored the code to keep state of whether the comment-field should be
visible or not.
www: Added AngularJS-version of prefix edit-page

The next step on our path towards porting the NIPAP web UI to AngularJS
has been taken, with the angulatification of the prefix edit-page.
Added a PrefixAddController, a template and routes to the new controller
& template.

Statistics needs to be added before the page can be considered in
feature parity with the old prefix edit-page.
www: Added statistics to ng-prefix edit-page

Added statistics to the AngularJS-version of the prefix edit page. Did
it in a quite 'hacky' way to keep up the steam, it should be done in a
more AngularJS-ish way in the future.
www: Link to ng-edit prefix-page in prefix list

Changed the 'Edit prefix' link in the prefix list popup menu to the
AngularJS version of the edit prefix-page.

Fixes #621
Add check for file permissions on ~/.nipaprc
Made inherited tags field read-only

Made the inherited tags field read-only-ish with the workaround given in
https://github.com/mbenford/ngTagsInput/issues/241.

Also hid the iherited tags field in the prefix form when used on other
pages than the prefix edit page.
cli: move config parsing from module

It's just all evil to execute directly in a module so we move
configuration parsing to the CLI 'nipap' executable from the nipap_cli
module.
Merge pull request #634 from garberg/621-angularify_prefix_edit

Added AngularJS-version of prefix edit-page
Merge branch 'cli/move-config-parsing'
www: Added AngularJS version of add VRF-page

Added an AngularJS version of the add VRF-page. Templates prepared for
reuse on edit VRF-page.
www: Added AngularJS version of edit VRF-page

What the title says.
www: Link to AngularJS-versions of VRF pages

Changed the links to the VRF add and edit pages to point to the
new AngularJS versions.

Fixes #635
Merge pull request #640 from garberg/635-angularify_vrf

Angularified VRF add & edit pages
"no VRF" is now called "default"

.. although it can be renamed, so let _get_vrf also return the true name
of it.
Fix shebang lines to call env instead of python directly
Merge pull request #648 from darkfiberiru/portability-fixes

Fix shebang lines to call env instead of python directly