Run the install.sh / uninstall.sh scripts.

bashrun is installed under /usr/local by default (as of version 0.8) 

Use --prefix=/prefix/path to change the install prefix.

Note that if you use --prefix, you will have to pass the same prefix
to uninstall.sh.

If you have a version prior to 0.8 installed, uninstall it using
'./uninstall.sh --prefix=/usr' (as root) before upgrading.

