[pgjdbc/pgjdbc] 90535d: docs - change load.md to reflect currentpractice ...

Branch: refs/heads/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 90535d9289141c398b2e62f2ee7571617c5aecc3
      https://github.com/pgjdbc/pgjdbc/commit/90535d9289141c398b2e62f2ee7571617c5aecc3
  Author: bpd0018 <bpd0018@gmail.com>
  Date:   2018-01-08 (Mon, 08 Jan 2018)

  Changed paths:
    M docs/documentation/head/load.md

  Log Message:
  -----------
  docs - change load.md to reflect current practice (#1058)

The documentation in head should reflect current best practice while still providing the historical background needed
bydevelopers who are maintaining older code. I think this documentation change covers the significant points
 
1. you no longer need to explicitly load the driver
2. the driver jar file must be on the classpath in order for the driver to load
3. the old way still works but isn't needed