generator support for property lists
fix for rewrite task generation
Merge branch 'master' into prop-lists

Conflicts:
	org.metaborg.meta.lang.nabl/trans/generation/constraints.str
	org.metaborg.meta.lang.nabl/trans/generation/sections.str
deleted old bootstrapping and test directory
new generated build file
bootstrapped generation
fixed erroneous merge (correct imports, correct strategy names +
arities)
brought back nabl-name rule generation
fixed generation of prop-site rules (added missing parameter)
fixed the merge by systematic comparison of merged and pre-revert
version
generating more robust code; where clauses for properties don't let the
rule fail if there are no rules for this property yet
proper abstract syntax
bootstrapping changed this file
Merge branch 'master' into prop-lists

Conflicts:
	org.metaborg.meta.lang.nabl/build.generated.xml
	org.metaborg.meta.lang.nabl/build.main.xml
	org.metaborg.meta.lang.nabl/trans/generation/sections.str
	org.metaborg.meta.lang.nabl/trans/generation/use-sites.str
include outline
regenerated
generate rules to query scopes
re-generated
use new property collection strategies and generate store strategies for each property
first constraints can be specified in NaBL