Update build infrastructure significantly

Author: fxfactorial

_tags

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+# OASIS_START
+# DO NOT EDIT (digest: b8c02e1216b30baf1ecf53390bc3a342)
+# Ignore VCS directories, you can use the same kind of rule outside
+# OASIS_START/STOP if you want to exclude directories that contains
+# useless stuff for the build process
+true: annot, bin_annot
+<**/.svn>: -traverse
+<**/.svn>: not_hygienic
+".bzr": -traverse
+".bzr": not_hygienic
+".hg": -traverse
+".hg": not_hygienic
+".git": -traverse
+".git": not_hygienic
+"_darcs": -traverse
+"_darcs": not_hygienic
+# Library nodejs
+"src/nodejs.cmxs": use_nodejs
+<src/*.ml{,i,y}>: pkg_js_of_ocaml
+<src/*.ml{,i,y}>: pkg_js_of_ocaml.ppx
+<src/*.ml{,i,y}>: pkg_yojson
+# OASIS_STOP
+"examples/node_modules": not_hygienic