linux instructions added

windows users need more help though;)

README.rst

@@ -60,7 +60,7 @@ We follow this `git branching model <http://nvie.com/posts/a-successful-git-bran
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 Installation instructions
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-If you are installing from an internet-connected computer (or virtual install), you can use the pip python package manager to download and install this package. Simply type ``pip install pybloom-live``.
+If you are installing from an internet-connected computer (or virtual install), you can use the pip python package manager to download and install this package. Simply type ``pip install pybloom-live`` from a DOS command prompt (``cmd.exe``) or a linux shell (e.g. ``bash`` or ``dash`` on MacOS X as well as linux OSes including debian, slackware, redhat, enoch and arch.
 
 If using Windows and you are installing onto an airgapped computer or want the most up-to-date version from this repository, you can do the following:
 
@@ -72,6 +72,7 @@ If using Windows and you are installing onto an airgapped computer or want the m
   c. Select "Open command window here".
 4. Type ``pip install .``.
 
+Similar steps are possible under linux and MacOS X.
 
 Installation verification
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