fix README.md i3wm comments to not say have to press Esc after finish…

…ing outputs

after merging minor change from branch next, re-commented out the C k…

…ill function and uncommented the spawn pkill -f ffmpeg, also updated version to 3.04 (forgot to update version on previous release)

when setting up an array of filenames, was doing a malloc of strlen b…

…ut actually need strlen+1 because strlen does not include the terminating nul character

forgot to add screenshot png

had to check for error on pkill or else segfault possible and also de…

…cided not to kill it twice - just using pkill to stop recording the screen

adding back README.md that I had to delete when merging next

updated ver to 2.6

updated version # reported by silentcast script