Updated the example to remove ambiguity.
Changed 'data' references to 'value' so that examples and text are consistent.
Removed a tab for formatting purposes.
Merge pull request #536 from james-phpgenie/1.6/develop

Updated the example to remove ambiguity.
Updated image save docs for filename which is now optional

Signed-off-by: Derek Myers <arcticpro@gmail.com>
Merge pull request #538 from dmyers/feature/image-save

Updated image save docs for filename which is now optional