oknesset_update wget timestamp and requirment fix

Changed wget command to not fetch if the db wasn't updated.
Also fixed mis-pasted path of requirements file.
Update main page about and what can be done
More events in index page
Merge branch 'master' of https://github.com/yoniYalovitsky/Open-Knesset
freeze_bills management command
Hightlight frozen bills
Merge branch 'guy1' of github.com:guysoft/Open-Knesset
added vote_flyer template design
https://github.com/MichaelDoron/Open-Knesset.gitMerge https://github.com/MichaelDoron/Open-Knesset into guy1
Merge from MichaelDoron