Merge pull request #18 from ledgersmb/1.4

1.4
Adding logic to reverse manual taxes

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extra : source : dd0565e2f8e622951dee4cbd71d5bb4bccdd70b0
Merging from github
adding basis reversal too

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extra : source : 32e750bac8fba240fc0ca4db5f819025b8f9453f
Merge pull request #123 from einhverfr/1.4

Fix for reversing manual taxes