Add support for releasing

Run gradle release to generate a release version of THULAC.
To run the generated release version, navigate to release/ and run the following command:
java -jar thulac-1.0.jar -input <input_file> -output output.txt
And open output.txt to see the result.
(The input file and the models are not included in this repo yet, how to obtain these files is left as an exercise for the user.)

.gitignore

@@ -1,4 +1,5 @@
-models/
-.idea/
-tmp/
+models
+.idea
+tmp
 /src/test/resources/
+release

build.gradle

@@ -1,12 +1,29 @@
-apply plugin: 'idea'
 apply plugin: 'java'
 
 repositories {
-	mavenLocal()
-	jcenter()
-	mavenCentral()
+    mavenLocal()
+    jcenter()
+    mavenCentral()
 }
 
 dependencies {
     testCompile group: 'junit', name: 'junit', version: '4.+'
+}
+
+jar {
+    version '1.0'
+    manifest {
+        attributes("Main-Class": "org.thunlp.thulac.main.Main")
+    }
+}
+
+task release(dependsOn: 'jar') {
+    copy {
+        from 'build/libs'
+        into 'release'
+    }
+    copy {
+        from 'models'
+        into 'release/models'
+    }
 }

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'thulac'