Update www/GraphicsMagick to 1.3.19 and bump PORTREVISION for consumers.

Note that graphics/GraphicsMagick12 was removed on 2014-05-20 because it is
no longer maintained upstream.

Detailed/other changes:

• graphics/GraphicsMagick :
  • Copy contents from graphics/GraphicsMagick13
  • Remove PORTREVISION and PKGNAMESUFFIX
  • Keep original pkg-descr, do not copy whitespace-only changes.
• graphics/pecl-gmagick :
  • Use modern LIB_DEPENDS
• graphics/vips :
  • Stage support
  • Use modern LIB_DEPENDS
  • USES libtool, pathfix
• multimedia/bombono :
  • Update BUILD_DEPENDS and RUN_DEPENDS
• textproc/htmltolatex :
  • Use modern LIB_DEPENDS

Phabric: D108 162
Approved by: portmgr (antoine, bapt)