Updated user interface

The user interface of ESpark has been improved for clarity.

EScope now produces only a ".escope" and a ".dat" file for each recording. (The old ".config" file has been subsumed into the ".escope" file.)

The GPL license text has been unambiguously applied to all source files.

Download the latest release from pypi through “pip install -U escope”.

More compact data format

ESpark now offers up to four channels. Its UI was cleaned up.
EScope now stores data in a more compact file format.
A python library to load EScope data is included.
Use "pip install -U escope" to get the latest version.