Removing alternatives from generated grammars
Use soft references for values instead of weak references in the WeakWeakMap, so that values are only finalised when there is enough memory pressure.
Update runtime libraries
Update runtime libraries
Update runtime libraries
Fix custom java files sometimes not being compiled.
Revert "Fix custom java files sometimes not being compiled."

This reverts commit e4d3bff159d40982d69950f7bab7d04e1d5faa49.
Towards a Nix-free build mechanism
Moving some things around and changing imports
Rename custom sdf2rtg and rename-sort definitions to avoid collision with those from libtools and libstrc
No longer assume that we should run install Ant task
Add stratego-front as build-time dependency
Raise source and target Java code level to 1.7
Delete old makefile
Cleanup build file. Add script to download the strategoxt distribution
Updated ignores
Merge branch 'master' into build-refactor
Add the build-lib from the distribution into the lookup path for the Ant build
Delete obsolete library code
Move prop up