SubCpp Code

Synced to upstream.

Updated external to point at the correct GitHub repo.

Updated external to point to GitHub.

Updated changelog for proper ppa upload.

Removed C++11 support because it can't be built with it on Precise.

Upreved for release.

Removed the --soname from premake line. Unneeded after presets4.lua update.

Ability to Push() a revision in SubLua.
Added Upgrade(), GetWorkingCopyFormatVersion(), and ParseExternalsDescription() to SubLua.
Added an optional log message in SubLua:Delete().
Added "ParseExternalsDescription()" to SubCpp.
Updated the SubLua documentation.
Updated the SubLua tests to pass in our "in-house" environment.
Upreved changelog.
Sync from upstream.

64bit warning cleanup
made listener optional
Added protection against NULL pointers which were caused if a lock was created without a comment
read version from /include/subversion-1/svn_version.h and use it to determine if neon or serf should be used
fix warning
fix status
added GetRFC822Date
added log message parameter to PropSet
cleaned up log message and login related api in context
added ParseExternalsDescription
fixed 'username' and 'password' parameters in the constructor of SubLua
eolstyle native

Updated LDoc the SubLua documentation generation scritps.
Fixed main example of SubLua in the docs.