Add libdca

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
package wavpack: add missing exec_prefix in wavpack.pc

I get a build error in the xine-lib package after the latest wavpack
update because exec_prefix is not defined in wavpack.pc.
package boost: fix WinError capitalization
update package hdf5
update package wt
package openscenegraph: only update to stable releases
update package imagemagick
update package poco
package libnut: fix update placeholder
package sdl_ttf: ignore future 2x series updates
Merge pull request #273 from TimothyGu/dca

Add libdca
package libdca: fix update placeholder
package lapack: update changed checksum
update package glibmm
update package librsvg
update package armadillo
package apr: update ignored version
doc update: java runtime not required for OSX
package hdf5: fix checksum and autoconf version patch
Revert "package ffmpeg: disable libnut on i686-pc-mingw32"

This reverts commit fc46813219e8d925d3ab54a1d40190d8b805487a.

Some how I forgot to do this during #258.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>