Add svnrload: currently a heavy WIP, with most of the code imported
from svnrdump

* subversion/svnrload
* subversion/svnrload/load_editor.c: From svnrdump/dump_editor.c
* subversion/svnrload/svnrload.c: From svnrdump/svnrdump.c
* subversion/svnrload/load_editor.h: From svnrdump/dump_editor.h
* subversion/svnrload/parse_dumpstream.c: Functionality to parse a
  dumpstream


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svnrload@979002 13f79535-47bb-0310-9956-ffa450edef68
4 files changed