Merge pull request #105 from einhverfr/1.3

Porting in COGS type fix
Merge pull request #122 from einhverfr/1.3

Adding logic to reverse manual taxes
Merge pull request #127 from einhverfr/1.3

Version number changes for 1.3.40
Merge pull request #129 from einhverfr/1.3

fix entry for changelog for tax reversal issue
Merge pull request #21 from ledgersmb/1.3

1.3