Windows installer enhancements

[casperstorm]

This is a collection of enhancements for the Windows installer.

Right now we are using default wix settings in order to generate the .msi installer for Windows: https://github.com/volks73/cargo-wix.

• Wizard is not branded with Ajour graphic.
• "Custom Setup" gives the opportunity to select which components to install. Maybe this is unnecessary complex.
• "Unknown publisher" – we should look into signing it.
• Maybe, if possible, a pre-checked checkbox to automatically launch Ajour after installation.
• Option to create shortcuts to the startmenu and desktop.

[mlablah]

My personal preference when it comes to the relative importance of the items in the list above are:

• Option to create shortcuts to the startmenu and desktop.
• Maybe, if possible, a pre-checked checkbox to automatically launch Ajour after installation. (assumes Auto generate a default ajour.yml file. #29 has been implemented)
• "Unknown publisher" – we should look into signing it.
• Wizard is not branded with Ajour graphic.
• "Custom Setup" gives the opportunity to select which components to install. Maybe this is unnecessary complex.

[casperstorm]

@mlablah and I have just discussed this issue.
We have decided to move away from a Windows installer at this given time, and just distribute an executable .exe.

The main idea with an installer is to create a few shortcuts, add the application to add/remove list, and in general be in control of the installation. In our case we only have 1 file to distribute so in order to keep things simple, we are removing the installation part for now.

I'll close this issue and from next release, a .exe, alongside a .zip (which includes a ajour.yml) will be distrubuted with every release.