Merge pull request #300 from hallahan/master

Simple Plugin Demonstrating Stdout streaming of Child Proc
Add hints about Mac compiler install and Ruby build
Merge pull request #301 from mkelleyharris/master

ReadMe change per your request, "Add hints about Mac compiler install and Ruby build"
beter references to emitted elements
future page offers references to same-name pages in current neighborhood.
better wording
handle only keys specified in text
handle only limit specified in text
zero isn't missing data
merge partial objects until complete objects
radar plugin documentation
explain the apply function
backed out orgin code, so don't test it
site the plugin source
plugin simulates pushpins on d3 map
whitespace changes
hover text for page's flag
work in progress on image manipulation
skip the debugging. simplify for next programmer.
improved error messages for claim/login