Refactoring

* rewritten marks (more performance for multiple vertices)
* fixed a bunch of instructions
* added a starting point for save/load graph instructions

build.gradle

@@ -0,0 +1,15 @@
+apply plugin: 'java'
+apply plugin: 'eclipse'
+
+version='1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+	compile group: 'com.google.code.gson', name: 'gson', version: '2.8.5'
+	
+	compile group: 'commons-collections', name: 'commons-collections', version: '3.2'
+    testCompile group: 'junit', name: 'junit', version: '4.+'
+}