Issue #28 Fix, check for tika.jar

[andymanning]

No description provided.

[tbpg]

Thank you! One suggestion, otherwise looks good.

[tbpg]

Suggested change

	//Check if the jar file exists
	_, err := os.Stat(jar)
	if os.IsNotExist(err) {
	return nil, fmt.Errorf("jar file [%s] does not exist", jar)
	}
	// Check if the jar file exists.
	if _, err := os.Stat(jar); os.IsNotExist(err) {
	return nil, fmt.Errorf("jar file %q does not exist", jar)
	}