feature: Add ability to get existing query params (#9)

- You can now get query params already set on the builder without converting to a query string using `getQueryParameters()`. This returns an ordered map contains a list of all values for each query parameter name.
- Also add `toURI()` and `toURL()` convenience methods.

This also fixes an issue in how query parameters are parsed, where "value-less" parameters are being discarded. (e.g. /foo/bar?valueless).

build.gradle

@@ -1,4 +1,5 @@
 plugins {
+    id 'groovy'
     id 'idea'
     id 'java'
     id 'maven-publish'
@@ -10,19 +11,27 @@ plugins {
 group = 'com.widen'
 ext.repo = 'https://github.com/Widen/' + project.name
 
-sourceCompatibility = 1.6
-targetCompatibility = 1.6
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
 
 repositories {
     jcenter()
 }
 
 dependencies {
-    compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.54'
-    compile group: 'org.bouncycastle', name: 'bcpkix-jdk15on', version: '1.54'
+    compileOnly 'org.projectlombok:lombok:1.18.2'
+    annotationProcessor 'org.projectlombok:lombok:1.18.2'
 
-    testCompile group: 'junit', name: 'junit', version: '4.8.2'
-    testCompile group: 'commons-io', name: 'commons-io', version: '2.4'
+    compile 'org.bouncycastle:bcprov-jdk15on:1.54'
+    compile 'org.bouncycastle:bcpkix-jdk15on:1.54'
+
+    testCompile 'cglib:cglib-nodep:3.2.5'
+    testCompile 'commons-io:commons-io:2.4'
+    testCompile 'junit:junit:4.8.2'
+    testCompile 'org.codehaus.groovy:groovy-all:2.4.9'
+    testCompile 'org.objenesis:objenesis:2.6'
+    testCompile 'org.slf4j:slf4j-simple:1.7.25'
+    testCompile 'org.spockframework:spock-core:1.1-groovy-2.4'
 }
 
 bintray {