Go to the answers section(blue button, top of page) and read the compiling from source guide that should be under software if my memory serves me correctly.
Good luck, post back here if you have any questions...
edit:hah, I wait 15 minutes for someone to say something because I figured if I said anything someone else would have said it before me...and then someone else does manage to post before me
anywho, it's usually the INSTALL or install file that tells you how to install, the readme typically only covers the functions of the program.