much more consistent controls behavior

some behavior inconsistencies fixed, small architecture changes

mac improvements + another bug dead

final changes to tests/data_access_tester.py & HOWTO

more/better documentation

improved documentation, substituted spaces for tabs in some places, extended HOWTO

(hopefully the last!) scaler bug fixed

fix some doc strings and inconsistent function names

controls handling improved / scaling still a bit buggy

add some stubs in HOWTO

update the graph controls, dynamically load the version string

README split up; some parts moved to HOWTO and lib/README

use any values on x-axis, not just time

comment data_import and add convertall.sh

lots of comments, improvements, simplifications to the scaling logic