Allow gitblit baseFolder to be defined by a system property

Koen Serry

2014-08-03 538991e465c7a3badceb5629c3410e16cc900778

 src/main/java/com/gitblit/transport/ssh/WelcomeShell.java

@@ -1,4 +1,5 @@
/*
 * Copyright (C) 2009 The Android Open Source Project
 * Copyright 2014 gitblit.com.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");