Add Activity modified to contain example and description. Also links
from registration to Home page are added.
Revert "Add Activity modified to contain example and description. Also links"

This reverts commit c71e90b13585481f881d7266810148842f60209c.
Revert "Revert "Add Activity modified to contain example and description. Also links""

This reverts commit 19f86cb99c8070de6d8dd1354fa0276f8afa4044.
Merge branch 'master' of https://github.com/CMEApp/Category2