A quantity with a unit like "15m" was being parsed internally as
0.249999999... rather than 0.25 (and since hledger 1.21, printed that
way also). Now we round such quantities to two places during parsing,
to get exact quarter-hour amounts.
Command-line account aliases now also affect transactions read
from these formats (not just journal format).
lib: journalApplyAliases, transactionApplyAliases, postingApplyAliases
helpers have been added.
