Using "hledgerdev" was a hack to help ensure that tests used a fresh
developer build by default. Now they specify "hledger" again, which fits
better with stack. It's up to the tester to make sure the desired
executable is first in PATH or specified with -w. (Note a couple of
tests currently don't obey -w and will always run "hledger", see addons.test).
In periodic multicolumn balance reports, column headings now show a more
compact description of common periods (years, half-years, quarters,
months, weeks) for better readability and screen space efficiency.
