Enhancements:
- Feature to enable and disable the alerts (#438)
- Introduce multithreading to rollupservice (#450)
- Slow threshold override for user (#474)
- Modal window close button is not fixed anymore (#490)
- Add support for Spring scheduled annotation (#502)
- Mail plugin (#514)
Bug fixes:
- Central collector rollups take too long and fall behind (#449)
- Could not initialize class org.glowroot.agent.weaving.MetaHolder27 (#488)
- org.glowroot.agent.api.Glowroot not working (#499)
- Glowroot Cassandra user needs create on all keyspaces (#505)
- Navbar issue when reverse proxying Glowroot UI (#512)