Sandbox added to fmsite

	new file:   fmsite/src/main/java/org/facematic/site/sandbox/SandBox.java
	new file:   fmsite/src/main/java/org/facematic/site/sandbox/SandBoxSampler.java
	new file:   fmsite/src/main/java/org/facematic/site/sandbox/Snippet.java
	new file:   fmsite/src/main/java/org/facematic/site/showcase/empty/EmptyCase.java
	new file:   fmsite/src/main/java/org/facematic/site/showcase/empty/readme.txt
	modified:   fmsite/src/main/java/org/facematic/site/showcase/viewer/ShowCaseViewer.java
	new file:   fmsite/src/main/resources/org/facematic/site/sandbox/SandBox.xml
	new file:   fmsite/src/main/resources/org/facematic/site/sandbox/SandBoxSampler.xml
	new file:   fmsite/src/main/resources/org/facematic/site/showcase/empty/EmptyCase.xml