Merging setup.pl enhancements to 1.3

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@5458 4979c152-3d1c-0410-bac9-87ea11338e46
Fixing is_zero errors for ar/ap transactions where tax is included

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@5460 4979c152-3d1c-0410-bac9-87ea11338e46
Merging ar/ap csv transaction tax fix from trunk

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@5462 4979c152-3d1c-0410-bac9-87ea11338e46