doc fixes

Author: stevengj

README.md

@@ -54,10 +54,11 @@ version number is returned by `PythonPlot.version`.
 
 ### Differences from PyPlot
 
-Compared to the PyPlot package, there are a few differences.
+Compared to the PyPlot package, there are a few differences in the API.
 
 * To avoid type piracy, the functions `show`, `close`, `step`, and `fill` are renamed to `pltshow`, `pltclose`, `pltstep`, and `pltfill`, respectively.  (You can also access them as `PythonPlot.show` etcetera.)
-* The PythonCall performs many fewer automatic conversions from Python types to Julia types (in comparison to PyCall).   If you need to convert Matplotlib return values to native Julia objects, you'll need to do `using PythonCall` and call its `pyconvert(T, o)` or other conversion functions.
+* The `matplotlibl.pyplot` module is exported as `pyplot` rather than as `plt`.
+* The PythonCall package performs many fewer automatic conversions from Python types to Julia types (in comparison to PyCall).   If you need to convert Matplotlib return values to native Julia objects, you'll need to do `using PythonCall` and call its `pyconvert(T, o)` or other conversion functions.
 
 ### Exported functions
 
@@ -103,7 +104,7 @@ function (`plot` etc.) is evaluated.
 However, if you use PythonPlot from a Julia script that is run non-interactively
 (e.g. `julia myscript.jl`), then Matplotlib is executed in
 [non-interactive mode](http://matplotlib.org/faq/usage_faq.html#what-is-interactive-mode):
-a plot window is not opened until you run `show()` (equivalent to `pyplot.show()`
+a plot window is not opened until you run `pyshow()` (equivalent to `pyplot.show()`
 in the Python examples).
 
 ## Interactive versus Julia graphics