Araq/Nimrod — pull request #1578 by Varriount (2014-10-19 06:39:41+00:00)
Title: Update the NSIS installer script.

Update the NSIS installer script. The installer has been changed in the following ways:
- If the download of a component errors, the user has the option to abort installation, retry the download, or ignore the download.
- Default to installing Nimrod in the root directory of the current drive.
- Add various tool paths to the PATH environment variable.
- Download component archives to a system-designated temporary path, rather than the installation path.
- The compression method is set to LZMA, instead of the default ZIP