fixes #51
updated loadStatements in the context to read the resources directory
for any .epl file with same name as class being attached. 

added loadStatementByName to load @name annotations.

Usage:

* Add epl file to resouces directory
* epl file will automatically get loaded with the attached command
* refrences epl statements by @name annottation within your epl file.
* Use context.loadStatementByName("") method to load statements by name
into calls
Merge pull request #51 from douggie/issues-51

Douggie's implementation of Esper statement binding using the `@name` annotation