Bug#848268: RFP: opentoonz -- 2D animation software

[Gürkan Myczko <gurkan@phys.ethz.ch>]

I tried to get opentoonz built, however the following still is a 
problem:
(http://phd-sid.ethz.ch/debian/opentoonz)

From 
https://github.com/opentoonz/opentoonz/blob/master/doc/how_to_build_linux.md:
Building LibTIFF
TODO: make sure we can use the system libtiff instead and remove this 
section.
Features from the modified libtiff are needed currently, so this isn't a 
simple switch.

Best,