Provide running instructions in the README

[w-martin]

Please provide running instructions in the README

[JohannesBuchner]

Yes please. I installed with local install, and then ran (in git-cal's git repo):

$ /home/user/.local/bin/git-cal

and received only:

git-cal: got empty log, nothing to do

while "git log" shows plenty of commits. Not sure what I am doing wrong.

[JohannesBuchner]

Please also include uninstall instructions.

[kleinph]

There seem to be a hardcoded filter for packages in the last year (--since="13 months" in

git-cal/git-cal

Line 90 in b3bb376

my $command = qq{git log --no-merges --pretty=format:"%at" --since="13 months"};

). So there will be no output for repos with its last commit over a year ago.