fixes missing files in dist package default tip

fixes duplicate line in help text

adds option to compute individual sums

preparing changes for individual sum feature

reorders processing of arguments (help text first)

fixes error message when directory access fails

adds simple tiny test suite and updates license headers

adds test file skeleton to build system

adds more autogenerated files to .hgignore

regex parser was not properly reset before each file, sometimes resulting in wrong line counts, when the previous scanned file ended with a match

(0) -10 tip