autogen 5.18.1

Closes #23064.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add HEAD

For the adventurous webp aficionados.

Closes #28620.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
nexus 2.8.0-05

nexus: upgrade to 2.8.0

Closes #28614.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
PredictionIO 0.7.0

Closes #28627.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
multimarkdown: add test

Closes #28630.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
rakudo-star: add jvm option

Closes #28408.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
formula: move cxxstdlib methods to the class.

This allows disabling this checks when e.g. pouring bottles.
gcc 4.8.2 (new formula)
shared: don't warn about non-Apple compilers now.
Support core GCC formula as a GCC compiler.

It is activated by the same mechanism as the Homebrew/versions compilers
which now check if the GCC formula uses the same, correct version.

References #28418.