Untrack CSS
Make Context Links Work

ManyToManyField would'nt work because of double quotes instead of single
quotes in models.py. Weak!
Now it works.
Update To Do List and Update SQL Doc.

Add item "context links" to "done list" and update SQL code in
installation doc.
Add Highlight for 'Active' Category
Add Title for Context Links to Page Details Template
Delete Obsolete Template
Add Sass Cache Files to Gitignore
Add .sass-cache Directory to .gitignore