updated meetup discussions to stay current

at present the README links to the initial (?) February meetup, this updates it to make sure it's evergreen.
updated current issues link to remain open

as per @terinjokes' comment in #5, without `state=open` Github will default to the user's previous state (open or closed), this ensures it will always show only open issues.
Merge pull request #5 from nquinlan/patch-1

updated meetup discussions to stay current