Urh

This release adds two highly demanded features to URH: __Spectrogram View__ and __Channel Separation__. Learn more about them in the [wiki](https://github.com/jopohl/urh/wiki/Spectrogram) and keep hacking like a boss!

This release adds installers for Windows. If you use the new installer and should get an error about missing api-ms-win-crt-runtime-l1-1-0.dll , run Windows Update or directly install [KB2999226](https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows).
__It is recommended to use the 64 bit version (amd64) of URH on Windows__, because 32 bit version has no native device support.

This release also fixes some bugs:

- Fix exhaustive fuzzing mode
- Fix a rare crash in Generator tab when performing undo
- fix checksum assignment to fuzzed messages when sending/generating data
- refresh estimated time in generator if pause was edited

The highlight of this release is support for __generic checksums__. You can define custom CRC polynomials or use predefined ones.
Learn more about this feature [in the wiki](https://github.com/jopohl/urh/wiki/Checksums).

Other fixes/features include:
- "Edit all" action in pause menu of generator tab
- Open Project now additionally possible by opening the project file
- bootstrapping of modulation when dropping first protocol to generator table
- new icons and improved UI
- improved auto detection of carrier frequency for modulation
- improved ASK demodulation algorithm
- fix a bug with relative paths on OS X
- fix selection behavior when extending selection with shift
- fix 306
- fix 308
- fix 310
- fix 311

This is a hotfix release that fixes dependencies in the precompiled wheels for Windows which were introduced in the previous release.

This release brings the following changes:

- 278: added a __repeat button__ to fuzzing dialog, next to the table with fuzzing values
- 284: fixed behaviour: "Your selection is empty!" sometimes pops up when creating a new signal from signal
- 285: fixed a rare crash when undoing a crop action
- 281: Optimized performance of protocol synchronization in Interpretation
- 286: improved context menu in Analysis
- 288: UI improvements: remove unneeded borders and increase visibility of splitter handle
- 290: fixed a crash occurring when pressing Analysis button in certain circumstances
- 291: created precompiled wheels for windows on PyPI, so no C++ compiler needed anymore.
- improved visual appearance of comboboxes in protocol label list view

This release brings a filter button to the Interpretation phase:

This way, you can smooth your signals right inside URH or unlock the full power of DSP fir filters by defining custom filters through the menu!