Add build instructions for Eclipse CDT + SConsolidator plugin.

Builds/Eclipse/README.md

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+**Requirements**
+
+1. Java Runtime Environment (JRE)
+2. Eclipse with CDT (tested on Luna):
+http://www.eclipse.org/downloads/packages/eclipse-ide-cc-developers/lunasr2
+3. Eclipse SCons plugin: http://sconsolidator.com/  
+**WARNING**: by default the SCons plugin uses 16 threads. Go to
+*Window->Preferences->SCons->Build Settings* in Eclipse and make it
+use only 4-8 jobs(threads) or whatever you feel confortable with. It will
+positively freeze your system if you run with 16 threads/jobs.  
+
+![scons](scons.png) 
+
+**Getting Started**
+
+After setting up Eclipse just do a File->New->Other...
+Select: C/C++ / New SCons project from existing source
+Point the importer to the folder where the SConstruct resides (the root
+folder of your git workspace normally)  
+
+**Build**
+
+Just hit Project->Build All in Eclipse to get started. And remember to not
+let it run 16 threads! 
+
+**Debug**
+
+Start a new Eclipse debug configuration and set binary to run to build/rippled
+(assuming you have built it).  
+
+![debug](debug.png)