Merge branch 'release/0.8' into develop
Writers: copy image only once
TuttlePlugin: generators with a connected input clip should not override the time domain

fix #260
Update Text plugin version #260
tuttleHost: better error handling when reading/writing plugins cache

fix #265
ofx: add utility functions
add TUTTLE_TLOG_TRACE and TUTTLE_TLOG_INFO
add FileExist exception
Writer plugins: add existingFile=skip option

close #77
Text: expressions simplification

fix #277
AVWriter: customFps modification updates the useCustomFps parameter

fix #269
nothing
tuttlePlugin: properties from ofx extensions

These extensions are not part of the standard, so they will not exist on all hosts.

fix #278
tuttlePlugin: put ChoiceLabel into the Hint as a fallback

Choice label is an ofx extension. If the host doesn't support it,
we put this information into the parameter hint.
Update Text version #277
Remove useless if undef windows macros

fixes #223
Update sequenceParser
Fixes a dummy writer condition in sam do

Previous version was throwing errors when parsing directories with
single elements (one sequence, one image or one directory )
Fixes #257 #271
compatibility with python3
fix for clang compilation