Added a 10 second timeout in the recognizing state

[sansyrox]

Fixes #513 This should work in principle, but since I haven't tested it on my speaker hence still WIP.

Checklist

• [x] I have read the Contribution & Best practices Guide and my PR follows them.
• [x] My branch is up-to-date with the upstream master branch.
• [x] The unit tests pass locally with my changes
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have added necessary documentation (if appropriate)
• [x] All the functions created/modified in this PR contain relevant docstrings.

Test Passing

• [x] The SUSI Server must be building on the pi on bootup
• [x] The hotword detection should have a decent accuracy
• [ ] SUSI Linux shouldn't crash when switching from online to offline and vice versa (failing as of now)
• [ ] SUSI Linux should be able to boot offline when no internet connection available (failing)

Short description of what this resolves:

This adds a 10-second timeout in the recognizing state.

Changes proposed in this pull request:

Used the threading class to add a timeout

[norbusan]

Looks fine to me. How do you want to proceed?

[sansyrox]

I'll set up my Speaker again by tomorrow evening and then we can merge it.

[sansyrox]

This seems to work fine on my side.

[norbusan]

Thanks, merged.