Clarify INSTALL doc slightly
Add web UI instructions to README.md
linkify url in README.md
Specify rpcallowip in web client setup example in README.md
updated build doc for OSX
makefile: libtorrent needs -lrt for linking
Merge pull request #30 from toyg/osx

updated build doc for OSX
Merge pull request #31 from sanchi/master

makefile: libtorrent needs -lrt for linking
Merge pull request #19 from Joeboy/master

Minor doc improvements