Fix on save handler not being invoked.
Implement non-transitive scopes.
Fixed single imports.
Remove hack
fix nabl-get-name generation for corner case where pattern and name are
the same
Merge branch 'master' of git@github.com:metaborg/nabl.git
Call get-or-creaty-property-task instead of just get-property-task
fail after storing properties; this allows us to store multiple
properties in different rules
fixed broken library imports
fix http://yellowgrass.org/issue/NaBL/77
create <property>-task strategy (issue #76)
prefer PropertyConstraint over RefPropertyConstraint
support for @ in patterns
support for qualities (properties w/o values)
Revert "support for qualities (properties w/o values)"

This reverts commit 13082574147876c7d971e2c1de3ae6b6025a573d.
Revert "Revert "support for qualities (properties w/o values)""

This reverts commit d9bd6a29fdd9cca1c979fd0b177d753db497cac2.
new syntax for qualities
Fix wrong imports.
add origin-track-forced in congruences
nabl-def-site and nabl-external-def-site now take same term arguments

fixes http://yellowgrass.org/issue/NaBL/86