Add a Spilhaus example.

Author: joa-quim

examples/projections/spilhaus.md

@@ -0,0 +1,12 @@
+# Spilhaus projection
+
+The Spilhaus Projection presents the world seas and oceans as a single body of water.
+
+\begin{examplefig}{}
+```julia
+using GMT
+resetGMT()		# hide
+grdimage("@earth_relief_15m", shade=true, R=:d, proj="+proj=spilhaus",
+          coast=(shore=true, frame="Wbet 30g"), show=true)
+```
+\end{examplefig}

geophysics/weather/01_weather.md

@@ -37,8 +37,8 @@ using GMT
 GMT.resetGMT() # hide
 
 # Download the ecmwf forcasts for the _u_ and _v_ components of the wind at 10 meters above the surface
-ecmwf(:forecast, var="10u", region="IHO23", filename="u10.grd")
-ecmwf(:forecast, var="10v", region="IHO23", filename="v10.grd")
+ecmwf(:forecast, var="10u", limits="IHO23", filename="u10.grd")
+ecmwf(:forecast, var="10v", limits="IHO23", filename="v10.grd")
 
 windbarbs("u10.grd", "v10.grd", Q="0.25c+s20+w0.15c", I="x10", proj=:guess)
 rm("u10.grd") # Hide