Add a runScript method to ij that takes a script as an InputStream and returns the output to a stream.

Useful for running ij SQL scripts as part of JUnit tests and for applications to use instead of the awkward way to use ij from a program today.

/**

• Run a SQL script from an input stream and write
• the resulting output to the provided OutputStream.
• @param conn Connection to be used as the script's default connection.
• @param sqlIn InputStream for the script.
• @param inputEncoding Encoding of the script.
• @param sqlOut OutputStream for the script's output
• @param outputEncoding Output encoding to use.
• @return Number of SQLExceptions thrown during the execution, -1 if not known.
• @throws UnsupportedEncodingException
  */
  public static int runScript(
  Connection conn,
  InputStream sqlIn,
  String inputEncoding,
  PrintStream sqlOut,
  String outputEncoding)
  throws UnsupportedEncodingException