Merge branch 'ya_variables' into 'master'

.Makefile.lint

.gitignore

Makefile

doc/aorai/Makefile

doc/aorai/main.tex

doc/aorai/transf.mll

doc/aorai/ya_file.bnf

doc/aorai/ya_variables.bnf

headers/header_spec.txt

src/kernel_internals/parsing/errorloc.ml

src/kernel_internals/parsing/errorloc.mli

src/plugins/aorai/.gitignore

src/plugins/aorai/Makefile.in

src/plugins/aorai/aorai_dataflow.ml

src/plugins/aorai/aorai_graph.ml

src/plugins/aorai/aorai_graph.mli

src/plugins/aorai/aorai_metavariables.ml

src/plugins/aorai/aorai_metavariables.mli

src/plugins/aorai/aorai_register.ml

src/plugins/aorai/aorai_utils.ml