Extract notice details from tpo

Update the json file updating the 'updated' attribute to True.
Print about update progress
Changes in the json
attachments -> num_attachments [Now store number of attachment 0 or 1 at the
beginning, late updated to its actual value]
text = the actual message of the notice
attachments = a list of dictionary containing attachment title and url

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>