Log version in JPS plugin

CompilerVersion.java is moved to cli-common (shared between compiler and JPS plugin) and renamed to KotlinVersion

This is needed because on TeamCity a JPS plugin is configured separately from the compiler, so it may happen that
JPS plugin version X tries to run compiler version X+100, and causes trouble.

compiler/cli/cli-common/src/org/jetbrains/jet/cli/common/KotlinVersion.java

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2010-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.jet.cli.common;
+
+public class KotlinVersion {
+    // The value of this constant is generated by the build script
+    // DON'T MODIFY IT
+    public static final String VERSION = "@snapshot@";
+}