Updated samples.json

- Added descriptions for "Maps from ArcGIS.com" category
Added sample Gauges with ArcGIS.com webmap

- This closes #3 for the Gauges webmap
Sample Fade effect using ArcGIS.com web maps

- all necessary files are present
- Most of the work is done
- Needs work to fix dojo/parser error: "Unable to resolve constructor
for: 'dijit.layout.BorderContainer'"
Minor fixes and formatting for Fade Effect sample

- moved named functions to outside start() function
- moved class variables outside of function
- declared map as Map object type
- still experiencing BorderContainer error...will issue a Bug
Reconciling Conflicts for Pull Request #117
Merge branch 'amarinelli-master'