Release v0.1.3

See NEWS.md for details

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>

Release v0.1.2

See NEWS.md for details

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>

Autoconf fixups

Include ason_spec.tex

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>

v0.1: Release 0.1

The NEWS.md update has a bit more to say, but this is the first semi-usable
release. Tag it and ship it!

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>