Merging AP invoices creation date fix from trunk

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6224 4979c152-3d1c-0410-bac9-87ea11338e46
Removing 'apply discount' from using the overpayments.  merging from trunk

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6229 4979c152-3d1c-0410-bac9-87ea11338e46
Fixing tax id collision issues in contact form

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6233 4979c152-3d1c-0410-bac9-87ea11338e46
Applied Nick P's patch, partially (conflicted partially with tsvr's changes), fixed 860.

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6236 4979c152-3d1c-0410-bac9-87ea11338e46
Giovani's roundign fixes for 1.3, merged from trunk

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6239 4979c152-3d1c-0410-bac9-87ea11338e46
Point of sales screen fails to render on FCGI due to broken pricematrix check

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6245 4979c152-3d1c-0410-bac9-87ea11338e46
Correcting omitted account__delete function

git-svn-id: https://ledger-smb.svn.sourceforge.net/svnroot/ledger-smb/branches/1.3@6310 4979c152-3d1c-0410-bac9-87ea11338e46