Make portable version

[angelsix]

Have an option in dna.config file set as "portable" or similar. When DnaWeb is run in that instance it then asks for the folder to monitor on startup, to make it easy to run from a USB stick instead.

Process would go:

1. Copy the installed folder/contents of DnaWeb to a USB stick or other desired location
2. Edit the dna.config file and add "portable": "True" or similar
3. When running the DnaWeb.exe it will then prompt for for your project folder
4. Type the folder path or drag and drop it onto the window and press enter to then start DnaWeb on that folder