Bug #14, Fix to safely get the contents of a URL as JSON [LACE]

* New PHP method:  Evidence_Hub_Shortcode::print_json_file( $url )
Bug #8, Followup - add message for missing map/chart in MSIE 8 [LACE]
Bug #14, Abstract out the evidence-map fullscreen button [LACE]

* HTML markup + Javascript/JS
* New PHP method: Evidence_Hub_Shortcode::print_fullscreen_button_html_javascript()
Bug #14, Tidy - remove type="text/javascript" from <script> [LACE]
Bug #14, Followup - abstract out the fullscreen button - CSS style [LACE]
Bug #16, Fix "show_current_query" - move from "?q" to "?debug" URL parameter

* Edited PHP: Evidence_Hub::show_current_query()
* Pull #16
Bug #15, Move Javascript from "survey_explorer" PHP to JS file

* Javascript for WP/WordPress shortcode -(Pull #16)
Bug #15, JSLint fixes to "survey_explorer" shortcode Javascript
Merge pull request #16 from IET-OU/iet-ou/CR13/json-file

iet-ou/CR13/json-file : #13 Fix to safely get the contents of a URL as JSON [LACE] …
Dropped unused shortcode files
Revert "Dropped unused shortcode files"

This reverts commit 9a47309c66ab2688568c548bf2dde6bdaec23b80.
Bug #18, Fix to safely get json-decoded properties [LACE]

* .. From within WordPress post description
* WP shortcode:  [evidence_summary]
* New PHP method: Evidence_Hub_Shortcode_Evidence_Summary::json_get()
* Evidence_Hub_Shortcode::debug()