adjusted test

back to programmer port /dev/ttyACM3...

no need to skip "last text" display, comment edit

experimental implementation of rules to notify about certain conditions ...

during burndown

refactored/renamed module "usart", use own implementation, added test, ...

updated comments, some cleanup

fixed some comments

Merge branch 'master' of https://github.com/gitdode/lambda-avr.git

improved comments, made parameter constant

created LICENSE.md

mention unit test framework AVRJUnit

improved sound quality of the beep

added ability to set beep tone and a command to test/play with beeps

added tests for module "alert"

updated comments

adjusted test some more

new way of running tests

test new way of running tests

split tests into modules

updated gitignore

use "official" pin assignment

use prototype pin assignment

put back "official" pin assignment

- use size_t ...

- added tests
- some small improvements

- made function parameters readonly ...

- types with capital first letter
- updated comments and documentation

- one test was not included

- fixed obscure test failure

- use program space for unit test instances instead of data space ...

- "private" variables static
- removed updateDisplay()
- renamed some functions

ISP port /dev/ttyACM3

do not reset latest measurements

sorted tests alphabetically (like in Jenkins)