iet-ou/CR6/svg-logo: Make SVG logo & colours customizable, SVG meta-data etc. [LACE]

Hi Martin,

Thanks for the last pull.

When you have moment would you mind pulling these commits for various LACE-related enhancements/fixes:

* #9, Add debugging output to help with the WP shortcode cribsheet,
* #8, Add message for missing map/chart in Internet Explorer/ MSIE 7/8,
* #7, Add <title> and meta-data to SVG logos - accessibility,
* #6, Make SVG logo and colours customizable,

Thank you, Nick.