[Squirrel-sql-develop] Suggested changes to simplify using 1.3 (Java14.java)

[BradLyon <bra...@nt...>]

I won't be able to update to the 1.4 jdk for a while.  Does anyone have a 
problem with adding some stuff so that

- You can exclude Java14.java from the build via an Ant parameter (I assume 
the javac task can handle this)
- We use reflection in Main.java on the "init" call to Java14, so that this 
file doesn't need to be changed when you're not using 1.4