Better installation instructions

[cas--]

It was obvious in hindsight that I would need git-svn but was very confusing when I got git: 'svn' is not a git command. running svn2git for the first time. It might be handy to add this to the installation instructions.

Also on Ubuntu ruby gems are installed in /var/lib/gems/1.8/bin so either that needs to be added to the users path or a symlink in /usr/bin to svn2git is required otherwise the program will not show up.

[p3k]

+1 for both suggestions.

[nirvdrum]

I'll add the note making sure to have git-svn installed. Thanks for the suggestion.

I'll have to see what can reasonably be done on the Ubuntu side. Usually an installed gem executable ends up in /usr/local/bin. All my Ubuntu machines have RVM installed though, so it's a bit different. I'll bring up a new VM to test in.