Continuing Meteor Rework

- Most events now have lower and upper bounds. ETAs, number of meteors,
wave delays, you name it
- Bar supplies vastly extended and spawn system mostly unfucked
- Changelog included
- Minor map modifications to include new spawnpoints (landmarks)
- Included is the -commented- line announcement in meteor.dm and the
announcements.txt file ready for generation. To activate, simply
generate then uncomment line 31 of meteor.dm
Dreammaker in charge of registering changes
Removing now outdated commented code
Merge pull request #1331 from dylanstrategie/Meteor

Continuing Meteor Rework