merged the following changes from trunk

PDFBOX-1293 rev. 1480030
PDFBOX-1561 rev. 1469558
PDFBOX-1565 rev. 1467638
PDFBOX-1580 rev. 1477806,1478472
PDFBOX-1581 rev. 1486413
PDFBOX-1583 rev. 1476795
PDFBOX-1586 rev. 1479136,1479287
PDFBOX-1592 rev. 1480000
PDFBOX-1599 rev. 1485781,1486337
PDFBOX-1601 rev. 1484089
PDFBOX-1602 rev. 1484277
PDFBOX-1603 rev. 1485771
PDFBOX-1605 rev. 1484547
PDFBOX-1611 rev. 1486423
PDFBOX-1612 rev. 1486440



git-svn-id: https://svn.apache.org/repos/asf/pdfbox/branches/1.8@1486661 13f79535-47bb-0310-9956-ffa450edef68