Adding gradle support and google java code formatter

Author: gouthampradhan

.gitignore

@@ -0,0 +1,18 @@
+CheckerClass.template
+TaskClass.template
+TestCaseClass.template
+TopCoderTaskClass.template
+TopCoderTestCaseClass.template
+build/
+chelper.properties
+gradle/
+gradlew
+gradlew.bat
+leetcode.iml
+leetcode.ipr
+leetcode.iws
+out/
+problems/src.iml
+.idea/codeStyles/
+.idea/copyright/
+.idea/markdown-navigator/

.idea/google-java-format.xml

@@ -198,7 +198,6 @@ My accepted leetcode solutions to some of the common interview problems.
 - [Profitable Schemes](problems/src/dynamic_programming/ProfitableSchemes.java) (Hard)
 - [Maximum Vacation Days](problems/src/dynamic_programming/MaximumVacationDays.java) (Hard)
 
-
 #### [Greedy](problems/src/greedy)
 
 - [Jump Game](problems/src/greedy/JumpGame.java) (Medium)

.idea/gradle.xml

@@ -0,0 +1,12 @@
+plugins {
+    id 'java'
+    id 'com.github.sherter.google-java-format' version '0.8'
+}
+
+dependencies {
+    compile 'com.google.googlejavaformat:google-java-format:1.7'
+}
+
+repositories {
+    jcenter()  // or mavenCentral()
+}