Update list of US states to include the DC

This change will allow hams operating in the District of Columbia to properly set their station location.

application/views/station_profile/edit.php

@@ -84,6 +84,7 @@
 								<option value="CO" <?php if($my_station_profile->state == "CO") { echo "selected"; } ?>>Colorado</option>
 								<option value="CT" <?php if($my_station_profile->state == "CT") { echo "selected"; } ?>>Connecticut</option>
 								<option value="DE" <?php if($my_station_profile->state == "DE") { echo "selected"; } ?>>Delaware</option>
+								<option value="DC" <?php if($my_station_profile->state == "DC") { echo "selected"; } ?>>District of Columbia</option>
 								<option value="FL" <?php if($my_station_profile->state == "FL") { echo "selected"; } ?>>Florida</option>
 								<option value="GA" <?php if($my_station_profile->state == "GA") { echo "selected"; } ?>>Georgia</option>
 								<option value="HI" <?php if($my_station_profile->state == "HI") { echo "selected"; } ?>>Hawaii</option>