scripts/size: cleaner approach using posix-shell syntax, throwing away a dirty sed-call
scripts/size: build binary filesize via 'stat' instead of parsing 'ls'-output; introduce humanreadable varnames for all script arguments
scripts/size: introduce query_mcutype2flashsize() it's better readable and avoids a strange 'sed'-call
scripts/size: convert and AWK call to 'sh', using 2 steps because we cannot calc with floats
scripts/size: indentation and 'echo ""' to 'echo'
scripts/size: instead of using bash-arrays, use varnames
scripts/size: only build var $+IMAGESIZE once and move down to 1st usage
scripts/size: use own function for 'symbol_bar', better readable
scripts/size: shebang now for all shells, not bash-only
scripts/size: more portable solution for getting the filesize. instead of using 'stat' and instead of parsing the output of 'ls -nl' (which was the old way), we read once the entire file: this is slow on large files, but we exspect to have ~200k here, so it does'nt matter. something to read about: http://stackoverflow.com/questions/1815329/portable-way-to-get-file-size-in-bytes-in-shell
Merge pull request #281 from bittorf/feature_refactoring_calling_avrsize

scripts/size: cleaner approach using posix-shell syntax, throwing away a dirty sed call