Lots of cleanup & the march toward 1.0.

-   .ovpn generation works now
-   now builds an installer for just the CA is enabled but broken
-   remote IP addr/subnet now parameterized in config
-   get rid of Neuric specific stuff everywhere
-   get rid of old scripts newvpnkey.py and makecainstaller.py
-   all nsis stuff is inside its own folder now
-   the nsis stuff isn't templates anymore; all parameterization is done
    with nsis itself. writing temp files no longer necessary.
-   code edits for clarity and formatting
-   more reliable path handling (esp. on Windows)