Update version to number to 1.20150409.
Update version to number to 1.20150409.

The new numbering schema is based on the idea presented in
<URL: http://joeyh.name/blog/entry/version_numbers/ >.

dag-erling/tsdfx,petterreinholdtsen/tsdfx,abdulrahmanazab/tsdfx,dag-erling/tsdfx,petterreinholdtsen/tsdfx,abdulrahmanazab/tsdfx,petterreinholdtsen/tsdfx,dag-erling/tsdfx