Rework gc.su import script

[kumy]

I've found that all gc.su waypoint name having character " in the title are badly encoded on import. This is caused by some weird text trasnformation in import script

geokrety-scripts/waypointy/ru/gpx2sql.php

Line 24 in e8c4920

$xml_raw = strtr(file_get_contents($baza), array('&' => '+'));

We should rework this script as done for OC in #9

link geokrety/geokrety-website#399

[okainov]

Will take a look maybe next week