Add cindex.search: find cursor in CursorList
Add cindex.search: find cursor in CursorList

matching given conditional.

Also adds show(::CXCursor) to replace hex dumps with something
useful.

ihnorton/Clang.jl,zhmz90/Clang.jl,ihnorton/Clang.jl,JuliaPackageMirrors/Clang.jl,zhmz90/Clang.jl,mdcfrancis/Clang.jl,JuliaPackageMirrors/Clang.jl,mdcfrancis/Clang.jl