Re: Runtime refactoring

Here's a pretty large patch that implements a major refactoring of the runtime code. Specifically:

- Move the bulk of the core code from main() into a new Runtime class.
- Break up the mass of code that was main() into a number of relatively simple functions.
- Make the Configuration dialog synchronous so the Log dialog can be properly viewed.
- Enable/disable menu options at the right time.
- Remove support for Qt < 5.0.
- Remove the application name constant and hardcode the name to simplify the code.
- Improve log messages.
- Replace the sdbm hashing with Qt's MD5 hashing.

Please review & test, but do not commit before next week's release.

Thanks!

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Dave Page
Blog: http://pgsnake.blogspot.com
Twitter: @pgsnake

EDB: http://www.enterprisedb.com