Update to Spoofax Nightly - s41087
Merge commit 'fb1896c56f4a341f22b5cbd0d91952b31eab3b3f' into labs
Merge commit 'e3110da9462ba0167bf5f8627d8031036d5413b7' into labs
Added maven pom.xml files.
Update primitives
Add make-set task factory that accepts extra dependencies.
HTML escaped property values in hover tooltip.
Adapt to changes in index interface.
Fix index globals
Fix analysis debugging
Storing properties have set semantics
Pass source argument to index-stop-collection.
Fix wrong argument order.
Distinguish between index primitives that return values and those that return key-value pairs.
Adapt analysis language to changes in index input.
Merge branch 'index-ds-refactor'

Conflicts:
	org.spoofax.meta.runtime.libraries/task/tasks.str
Merge pull request #13 from dcharkes/set-based-properties

Store properties from NaBL with set semantics.
Merge pull request #12 from Virtlink/master

HTML escaped property values in hover tooltip.
Merge pull request #11 from dcharkes/master

More meaningful default message for duplicate definitions.
Added missing import