Add Lyle's patches:

1. Check employee name non-empty-ness
2. Make sure there's at least one heading in the account headings table
Merge pull request #4 from ehuelsmann/1.3

Add Lyle's patches for 1.2->1.3 migration.
Merging fix for printing without invoice/order numbers
Merge pull request #17 from einhverfr/1.3

Merging fix for printing without invoice/order numbers
Fix #1102 and #1098: fix AR/AP tax included and overwritten notes.
(grafted from 5c9e54e201eb67317da0b0003fe7f043d7cc6d2d)
(grafted from a30d0808e2db2cffcc2b49c1d120408398e9559b)

--HG--
extra : source : 5c9e54e201eb67317da0b0003fe7f043d7cc6d2d
Merge pull request #27 from ehuelsmann/1.3

Fix #1102 and #1098: fix AR/AP tax included and overwritten notes.
Fix #1096: double message in es_AR.po translation.
(grafted from 5c5a1109f1e38fc2aa7a97bc4a9e93189b5834b4)

--HG--
extra : source : 5c5a1109f1e38fc2aa7a97bc4a9e93189b5834b4
Merge pull request #32 from ehuelsmann/1.3

Fix #1096: double message in es_AR.po translation.
1.3/1.4 fix for internal server errors using cash/payment
Merge pull request #33 from einhverfr/1.3

1.3/1.4 fix for internal server errors using cash/payment
Merge pull request #1 from ledgersmb/1.3

1.3 wtf, sorry, if I mess up something, first time with github
Merge pull request #40 from pongraczi/1.3

Merge pull request #1 from ledgersmb/1.3
Fix for bug #1133 : Exchange rate issue when 1.000,00 format used. Description: ->{exchangerate} converted to float to be able to calculate prices for select items in foreign currency, but did not set back to user defined format, so, for example it changed from 223,43 into 22.343
Merge pull request #41 from pongraczi/1.3

Fix for bug #1133 : Exchange rate issue when 1.000,00 format used. Descr...
Merge pull request #6 from ledgersmb/1.3

1.3
Add latest commit to the Changelog.
Fix for bug #1078 : It have to set an initial value for the project_id, otherwise on empty project in the form cause that, the last of the previously set project number will remain. So, set to zero before it will be untouched or set to the selected projectnumber.
Merge pull request #44 from pongraczi/1.3

Fix for bug #1078 : It have to set an initial value for the project_id, ...
Merge pull request #8 from ledgersmb/1.3

1.3
Update Changelog.