added support for 'less is worse' thresholds

Sometimes you want to express 'less is worse' thresholds. That means setting the error threshold below the warning threshold. The problem was, that the error marking always went up to +Infinity. Concerns 16599a07.

Moved parser/target editor warning icon to the right, now the hide/show eye is still usefull even when only working with the text editor

Fixes #69, lexer correctly tokenizes number-number segments, numericLiterals are only considered literal token if it is folled by a punctuator.

Fixed issue where series color or axis change would note take immediate effect (needed a full refresh).

Changed name off config.js to config.sample.js to make it easier to upgrade with having to worry about config being overwwritten, if there is no config.js file config.sample.js will be read instead (requirejs fallback). Closes #65

Make sure kibana and grafana on same hostname do not interfere with each other

This happens if you have kibana on /kibana and grafana on /grafana, resulting in some bad redirects

added nonNegativeDerivative function