Refactor sqlthread

[shportix]

Repository contributions to the PyBitmessage project

Code

• Try to refer to github issue tracker or other permanent sources of discussion about the issue.
• It is clear from the diff what you have done, it may be less clear why you have done it so explain why this change is necessary rather than what it does.

Documentation

Use tox -e py27-doc to build a local copy of the documentation.

Tests

• If there has been a change to the code, there's a good possibility there should be a corresponding change to the tests
• To run tests locally use tox or ./run-tests-in-docker.sh

Translations

• For helping with translations, please use Transifex.
• There is no need to submit pull requests for translations.
• For translating technical terms it is recommended to consult the Microsoft Language Portal.

Gitiquette

• Make the pull request against the "v0.6" branch
• PGP-sign the commits included in the pull request
• Use references to tickets, e.g. addresses #123 or fixes #234 in your commit messages
• Try to use a good editor that removes trailing whitespace, highlights potential python issues and uses unix line endings
• If for some reason you don't want to use github, you can submit the patch using Bitmessage to the "bitmessage" chan, or to one of the developers.