Try to get more results by changing must queries into should

This tests different boost values and refs bst-mug#115.

src/main/java/at/medunigraz/imi/bst/trec/BoostExperimenter.java

@@ -0,0 +1,37 @@
+package at.medunigraz.imi.bst.trec;
+
+import java.io.File;
+import java.util.Set;
+
+import at.medunigraz.imi.bst.trec.experiment.Experiment;
+import at.medunigraz.imi.bst.trec.experiment.ExperimentsBuilder;
+
+public class BoostExperimenter {
+	public static void main(String[] args) {
+		final File relaxedTemplate = new File(RunnerDemo.class.getResource("/templates/relaxed.json").getFile());
+
+		ExperimentsBuilder builder = new ExperimentsBuilder();
+
+		for (float i = 1; i <= 5; i += 0.5) {
+			builder.newExperiment().withGoldStandard(Experiment.GoldStandard.FINAL)
+					.withTarget(Experiment.Task.PUBMED).withKeyword(String.valueOf(i)).withTemplate(relaxedTemplate)
+					.withWordRemoval();
+		}
+
+		Set<Experiment> experiments = builder.build();
+
+		for (Experiment exp : experiments) {
+			exp.start();
+			try {
+				exp.join();
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			}
+		}
+
+		for (Experiment exp : experiments) {
+
+		}
+	}
+
+}

src/main/resources/templates/relaxed.json

@@ -0,0 +1,88 @@
+{
+	"bool": {
+		"should": [
+			{
+				"multi_match": {
+					"query": "{{disease}}",
+					"fields": [
+						"title^2",
+						"abstract",
+						"keyword",
+						"meshTags"
+					],
+					"tie_breaker": 0.3,
+					"type": "best_fields",
+					"boost": {{keyword}}
+				}
+			},
+			{
+				"multi_match": {
+					"query": "{{gene}}",
+					"fields": [
+						"title^2",
+						"abstract",
+						"keyword",
+						"meshTags"
+					],
+					"tie_breaker": 0.3,
+					"type": "best_fields",
+					"boost": {{keyword}}
+				}
+			},
+			{
+				"match": {
+					"_type": "extra"
+				}
+			},
+			{
+				"bool": {
+					"should": {
+						"multi_match": {
+							"query": "cancer carcinoma tumor",
+							"fields": [
+								"title^2",
+								"abstract",
+								"keyword",
+								"meshTags"
+							],
+							"tie_breaker": 0.3,
+							"type": "best_fields"
+						}
+					}
+				}
+			},
+			{
+				"bool": {
+					"should": {
+						"multi_match": {
+							"query": "gene genotype DNA base",
+							"fields": [
+								"title^2",
+								"abstract",
+								"keyword",
+								"meshTags"
+							],
+							"tie_breaker": 0.3,
+							"type": "best_fields"
+						}
+					}
+				}
+			},
+			{
+				"bool": {
+					"should": {
+						"multi_match": {
+							"query": "therapy treatment prognosis prognostic survival patient resistance recurrence targets malignancy study therapeutical outcome",
+							"fields": [
+								"title^2",
+								"abstract"
+							],
+							"tie_breaker": 0.3,
+							"type": "best_fields"
+						}
+					}
+				}
+			}
+		]
+	}
+}