Get rid of dependencies on v8.h in public header files

src/JsContext.h

Index: src/JsContext.h
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/JsContext.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of Adblock Plus <http://adblockplus.org/>,
+ * Copyright (C) 2006-2013 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ADBLOCK_PLUS_JS_CONTEXT_H
+#define ADBLOCK_PLUS_JS_CONTEXT_H
+
+#include <v8.h>
+#include <AdblockPlus/JsEngine.h>
+
+namespace AdblockPlus
+{
+  class JsContext
+  {
+  public:
+    JsContext(const JsEnginePtr jsEngine);
+    virtual ~JsContext() {};
+
+  private:
+    const v8::Locker locker;
+    const v8::HandleScope handleScope;
+    const v8::Context::Scope contextScope;
+  };
+}
+
+#endif