lavfi/graphdump: fix output for unknown layouts.
examples/filtering_video: update to new API

In particular, fix crash.
examples/filtering_audio: update to new API

In particular, fix crash.
examples/filtering_*: constify AVFrame * for print_frame() and display_frame() functions
lavf/avio: fix two extreemly unreasonble typos.
dynamic loading of shared faac library
avfilters: better behavior of frei0r on win32
programs: print version info and configuration only on -version
configure: fix modplug detection (it needs +lstdc++)
no Werror on implicit-function-declaration and missing-prototypes
custom icon and windows resource
use upstream version tag, my repo is always rebased