Gazetteer review

[itcareerswitch]

• [x] Add a pre-loader to hide the site until the first country has rendered
• [x] Title tag: Gazetteer
• [x] Two PHP routines to return information from countryBorders.geo.json; the first to return JSON containing just codes and names (sorted), the second to return JSON containing just the feature for the selected country
• [x] PHP should have more extensive error checking
• [x] Selecting geolocated country: Pass the navigator position coords via AJAX to a PHP routine that calls the GeoNames CountryCodeJSON API. It will return a country code - use it to change the value of the country select and fire the event handler: $('#countrySelect').val("DE").change()
• [x] Remove all markers when new country is selected
• [x] Name marker groups in layers control: https://codepen.io/itcareerswitch/pen/MWBgjGy/b7a8809a112eb804fbb659952e2a19f2
• [x] Format all dates and numbers (dateJS & numeralJS)
• [x] At a glance: https://codepen.io/itcareerswitch/pen/mdQxgRx/094165febdac816a99a162d754f5679d
• [x] Weather example - provide forecast: https://codepen.io/itcareerswitch/pen/vYzEBvX/58fd2357741ed73196232e5d295850e8
• [x] News example - no need for read more buttons, add class modal-dialog scrollable: https://codepen.io/itcareerswitch/pen/OJaypBQ/01f42a51bbea244d756dcbaf9496c1e5
• [x] Currency example - no need for convert button - use event handlers and calculate on opening: https://codepen.io/itcareerswitch/pen/dygBBam/a9c69b65f132c1f17c2552e72a244238
• [x] Keep console clear of all logs and errors

[tanikolo]

All assigned issues have been completed.

Summary of changes:

1. Added pre-loader to the site.
2. Changed title tag.
3. Added getCountryFeature.php.
4. Added extensive error checking for all php files.
5. Updated countrySelect value.
6. Implemented map.fitBounds.
7. Added function to remove all markers.
8. Added marker groups in layers control.
9. Formatted all dates and numbers.
10. Added pre-loaders to all modals.
11. Added forecast to weather modal.
12. Fixed all issues in news modal.
13. Changed functions for currency calculator.
14. Removed all console logs.
15. Created favicon.
16. Added polygon options.

All changes have been tested and verified. Please review and let me know if there are any further adjustments needed.

Thank you!