Added FEI Syntax-n-Snippets Package

This package adds syntax highlighting and useful snippets for scripting with the UCDavis ESSI (Earthquake Soil Structure Interaction simulator), which uses the FEI language (Finite Element Interpreter) as input.
Moved FEI Syntax-n-snippets to be in alphabetical order
Added the version selector to the entry of FEI Syntax-n-Snippets
Merge pull request #2418 from jaabell/master

Added FEI Syntax-n-Snippets Package