Refactor update creation api

This merge request does the following:

• Raise DRF errors rather than returning response to take advantage of the DRF exception handling mechanism
• Create serialisers for PUT request to simplify the code
• Improve validation checks in several places
• Fixes several issues in DRF infrastructure uses
• Fixes JSON fields handling
• Remove routes that do no fully qualify objects
• Implement a custom DRF exception handler that will allow to log errors
• Improve testing
• Improve permission management

beat/web/algorithms/templates/algorithms/edition.html

@@ -329,13 +329,14 @@ function setupEditor(algorithm, dataformats, libraries)
 
     var data = {
       {% if not edition %}
-      {% if algorithm_version > 1 and not fork_of %}
-      name: '{{ algorithm_name }}',
-      version: '{{ algorithm_version }}',
-      previous_version:'{{ algorithm_author }}/{{ algorithm_name }}/{{ algorithm_version|add:-1 }}',
-      {% else %}
-      name: $('#algorithm_name')[0].value.trim(),
-      {% endif %}
+        {% if algorithm_version > 1 and not fork_of %}
+            name: '{{ algorithm_name }}',
+            version: {{ algorithm_version }},
+            previous_version:'{{ algorithm_author }}/{{ algorithm_name }}/{{ algorithm_version|add:-1 }}',
+        {% else %}
+          name: $('#algorithm_name')[0].value.trim(),
+          version: 1,
+        {% endif %}
       description: (algorithm && algorithm.description) || '',
       {% endif %}
       short_description: (algorithm && algorithm.short_description) || '',