Reduce required version of gcc to 4.8 per latest project README

Reduce required version of gcc to 4.8 per latest project README

Add recommendation to pull pkg.template CI configs (ruslo#1400)

temporary release for acf v0.1.0

add FunctionalPlus package

drishti v0.8.9

* drishti v0.8.9
* example config.cmake.in:
   + acf w/ ACF_BUILD_OGLES_GPGPU=ON
   + lock xgboost in config @ 0.40-p10
   + lock nlohmann_json @ 2.1.1-p1 for android (really ndk10e partial c++11 issue)

drishti v0.8.8-p0

ACF_BUILD_OGLES_GPGPU=ON

override default acf package option in local config

update drishti version

update gpuimage, add example (objective-c++)