*: bump PORTREVISION of Imath users

...because math/Imath 3.1.9 reset the major version of
libImath to 29 from 31. See math/Imath 3.1.9 for details.

*: Bump revision of ports using math/Imath

...after its major revision update.

*: Bump PORTREVISION of math/Imath users

multimedia/{,py-}opentimelineio: Add PORTSCOUT tag

multimedia/{,py-}opentimelineio: Update 0.14.1 -> 0.15

Reported by:	portscout

*/*: Update path set in BUILD_DEPENDS for CMake

Commit b23ea4e2d2f51b53d8915fe9fd7b4efbdd575e38 changed its location to
devel/cmake-core

Approved by:	portmgr (blanket)

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

multimedia/{,py-}opentimelineio: Update PORTSCOUT tag

multimedia/{,py-}opentimelineio: Add PORTSCOUT tag

multimedia/{,py-}opentimelineio: Fix buid by adding missing C++ #include
statement

Reported by:	fallout

multimedia/py-opentimelineio: New port: API and interchange format for editorial
timeline information