Added meetup.com and o'reilly images. minor tweak to 8-24 meeting info

- added icon for meetup.com to homepage - links to windy city lug meetup page
- added link to same meetup.com page to the contact page
- added footer image to show we're part of o'reilly user group
- tweaked the home page text to not say 'please consider' - just 'consider'
- tweaked the 8-24 meeting page text