Change where pyinstaller runs the compilation

[WhenLifeHandsYouLemons]

Use the code for the cwd option here so that we can change it to install it in the .encryptext folder to then create a shortcut for the user to use. This will remove the issue of the dist and build folders potentially interfering with other folders with the same name.

This would go into the installer_window.py file.

[WhenLifeHandsYouLemons]

This can be done along with #31 because they both are to do with the installation procedure.