Add end-to-end tests for new features

dev-resources/test-fixtures/inputs/query/select/select-12.edn

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+;; SELECT with lists
+{:select [?x]
+ :where  [[?s ?p (1 ?x 3 4)]]}

dev-resources/test-fixtures/inputs/query/select/select-13.edn

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+;; SELECT with blank node vectors
+{:prefixes {:$    "<http://foo.org/>"
+            :foaf "<http://xmlns.com/foaf/0.1/>"}
+ :select   [?x ?name]
+ :where    [[[:p1 "v"] :q1 "w"]
+            [:x :q2 [:p2 "v"]]
+            [[:foaf/name ?name :foaf/mbox "<mailto:bar@example.com>"]]]}

dev-resources/test-fixtures/inputs/query/select/select-14.edn

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+;; SELECT with both lists and blank node vectors
+{:prefixes {:$ "<http://foo.org/>"}
+ :select   [?x]
+ :where    [{(1 [:p :q] (2 ?x)) {}}]}

dev-resources/test-fixtures/outputs/query/select/select-12.rq

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+SELECT ?x
+WHERE {
+    ?s ?p ( 1 ?x 3 4 ) .
+}

dev-resources/test-fixtures/outputs/query/select/select-13.rq

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+PREFIX :     <http://foo.org/>
+PREFIX foaf: <http://xmlns.com/foaf/0.1/>
+SELECT ?x ?name
+WHERE {
+    [ :p1 "v" ] :q1 "w" .
+    :x :q2 [ :p2 "v" ] .
+    [ foaf:name ?name ;
+      foaf:mbox <mailto:bar@example.com> ] .
+}

dev-resources/test-fixtures/outputs/query/select/select-14.rq

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+PREFIX : <http://foo.org/>
+SELECT ?x
+WHERE {
+    ( 1 [ :p :q ] ( 2 ?x ) ) .
+}