Windows Fixes

[radujipa]

This PR includes the following changes:

Windows 7, 8, 8.1 burning process fix https://github.com/KanoComputing/kano-burners/issues/32 This is done by splitting the pipe between 7zip and dd. This intrinsically implies that the minimum required MB is raised to 3.1GB for all windows versions. Another benefit of this fix is that src/windows/disk.py is now much simpler and requires less steps to prepare the disk for burning. Much of the unused code was therefore removed.

Dependency Screen https://github.com/KanoComputing/kano-burners/issues/19 The function check_dependencies() now takes a few seconds to complete and as a result, a new screen was introduced. The function is run in a separate QThread and the UI loop is free to proceed unfrozen. The screen features a gif spinner animation for which I included several versions (personally, I like all) but feel free to change this at ui.py#L114. (As an observation, animations do not seem to show in VirtualBox running Windows - works natively just fine)

Building process refactored The 3 steps required to build the app have now been incorporated into a single script in build/build.py. The script works on all platforms and the entire process now requires a simple python build.py. Should make life much easier. The built app can be found in the project folder /build/app/Kano Burner. Like before, only the .app \ .exe are to be distributed - rest is PyInstaller debugs. Note that building on Linux is still a problem because of PyInstaller. I have got it to work somehow once, but lost the Ubuntu Live USB to corruption before saving it.. There may still be hope..

Debug feature improved The debugger used throughout the app is now either printing to a file when running from PyInstaller bundle mode, or to stdout when running from source. This allows for debugging the bundle (not previously really possible), but also may prove useful if we ever decide to make a bug reporting feature like in Kano OS. This may be useful until the project reaches a level of maturity.

Temp directory replacement Not as significant, but it lead to much cleaner code in the end. Now, when running from source, the app will make a temp directory in the project folder (is ignored in .gitignore), and when running from bundle, the directory is created in the folder which holds all resources (see _MEI* in PyInstaller docs). I was hoping this may fix https://github.com/KanoComputing/kano-burners/issues/23, but it only does so for OSX. On Windows the archive still remains.

Successful Testing All features have been tested natively in OSX 10.10.2, Ubuntu Live 14.04 LTS, Windows 7, and Windows 8.1. Further testing was done in VirtualBox on Ubuntu 14.04 LTS, Windows 7, Windows 8, and Windows 8.1 on USB drives. (VB and Mac SD card reader don't want to play together)

I have redone all the tests since my first attempt.

[alex5imon]

@radujipa we are currently testing this.

Thanks a lot!!

[radujipa]

Glad to hear it! :)

Also, just found that /src/common/utils.py#L91 is broken - ip addresses must have changed (why did I do it like this?!). For testing please use something like

url_list = ['http://google.com',
                'http://twitter.com',
                'http://facebook.com',
                'http://youtube.com',
                'http://amazon.com']

I can include this is in the next PR or add them yourself, which ever would be quicker :)

[alex5imon]

@radujipa change them in this PR

[radujipa]

Links tested, replaced, and working.

[alex5imon]

@radujipa just so you know, the Windows burner was detected as a Virus by Windows Defender.

We have started the process with Microsoft so this does not happen again.