Added buffer cleanup and tweaked the reconcile quit routines.
Ensure target balance is actually parseable as a number
Adjust subtraction to scale operands up, thereby avoiding the silly long results
Remove leg-new and made leg-mode the entry point.
Finished changing name to ledger-*

All files and references changed ldg-* to ledger-*
Add ledger-mode-should-check-version to disable startup checks.

This is for users who are not using the official Ledger, say maybe hedger…