added a function to scrape redundent legends
added impedance embedding for a media.line()
created to_meters() function for more modular/reuseable  unit conversion
added more units to to_meters (and thus line() functions)
fixed unit error for inch and mil (was inverted)
minor
added skrfshirt pic
Update README.rst
Rename README.rst to README.md
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Fixes sign error in reflection_coefficient_at_theta function
changed argument to plot_s_smith from `z` to `s`
Merge branch 'master' of github.com:scikit-rf/scikit-rf
Merge pull request #32 from gibbons/master

Fixes sign error in reflection_coefficient_at_theta function