Protect call to av_read_frame; hopefully fixes #37
AVOptions v0.0
Wrapped ffmpeg 2.4
Set wrap_c.InternalOptions(true, true)

* Allows output types to be immutable by default
* Note that this currently requires Clang master to run
int64( 0x8000000000000000 ) -> reinterpret(Int64, 0x8000000000000000)

* required for v0.4 compatibility
Merge pull request #46 from kmsquire/AV_NOPTS_VALUE

int64( 0x8000000000000000 ) -> reinterpret(Int64, 0x8000000000000000)
Update build.jl
Merge branch 'master' of https://github.com/kmsquire/VideoIO.jl

AVOptions merged with updated VideoIO master