added a simple README in markdown, pretty-much cloning the homepage of iterm2.com

README.md

+# What is iTerm2?
+
+iTerm2 is a replacement for Terminal and the successor to iTerm. It works on
+Macs with Leopard or Snow Leopard. Its focus is on performance,
+internationalization, and supporting innovative features that make your life
+better.
+
+## Why Do I Want It?
+
+Check out the impressive [features](http://www.iterm2.com/#/section/features)
+and [screenshots](http://www.iterm2.com/#/section/features).  If you spend a
+lot of time in a terminal, then you'll appreciate all the little things that
+add up to a lot.
+
+## Where Do I Get It?
+
+You can find the latest precompiled versions at
+(googlecode)[http://code.google.com/p/iterm2/downloads/list], or clone this
+repository and build it yourself.
+
+## How Do I Use It?
+
+Try the [FAQ](http://www.iterm2.com/#/section/faq) or the
+[documentation](http://www.iterm2.com/#/section/documentation). Got problems or
+ideas? Report them in the
+[bug tracker](http://code.google.com/p/iterm2/issues/entry), or take it to the
+[forum](http://groups.google.com/group/iterm2-discuss).  Or tweet to
+[@gnachman](http://twitter.com/?status=@gnachman) and I'll do my best to
+respond.
+
+## Other Info
+
+For anything not mentioned here, try the main
+[iTerm2](http://www.iterm2.com/#/section/home) website.