Track existing groups by their full name.

Fixes #1

src/main/java/com/moandjiezana/toml/TomlParser.java

@@ -155,7 +155,6 @@ class TomlParser extends BaseParser<Object> {
   @SuppressWarnings("unchecked")
   boolean addKeyGroup(String name) {
     String[] split = name.split("\\.");
-    name = split[split.length - 1];
 
     while (getContext().getValueStack().size() > 2) {
       drop();

src/test/java/com/moandjiezana/toml/RealWorldTest.java

@@ -2,6 +2,7 @@ package com.moandjiezana.toml;
 
 import static java.util.Arrays.asList;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import java.io.File;
@@ -67,6 +68,14 @@ public class RealWorldTest {
     assertEquals(asList("]"), theHardBit.getList("multi_line_array", String.class));
   }
 
+  @Test
+  public void should_allow_keys_with_same_name_in_different_groups() throws Exception {
+    Toml toml = new Toml().parse(new File(getClass().getResource("should_allow_keys_with_same_name_in_different_groups.toml").getFile()));
+
+    assertTrue(toml.getKeyGroup("siteInfo.local.sh").getBoolean("enable"));
+    assertFalse(toml.getKeyGroup("siteInfo.localMobile.sh").getBoolean("enable"));
+  }
+
   @SuppressWarnings("unchecked")
   private void printMap(Map<String, Object> map) {
     for (Map.Entry<String, Object> entry : map.entrySet()) {

src/test/resources/com/moandjiezana/toml/should_allow_keys_with_same_name_in_different_groups.toml

@@ -0,0 +1,4 @@
+[siteInfo.local.sh]
+enable=true
+[siteInfo.localMobile.sh]
+enable=false