Renamed Util to API

Added SOM classes for English & Metric
Use WP HTTP API for requests

lib/SOMEnglish.class.php

@@ -0,0 +1,48 @@
+<?php
+
+class WPStrava_SOMEnglish extends WPStrava_SOM {
+
+	/**
+	 * @param string $m meters
+	 * @return string mi
+	 */
+	public function distance( $m ) {
+		return number_format( $m / 1609.344, 2 );
+	}
+
+	/**
+	 * @param string $dist miles
+	 * @return string meters
+	 */
+	public function distance_inverse( $dist ) {
+		return number_format( $dist * 1609.344, 2 );
+	}
+
+	public function get_distance_label() {
+		return __( 'mi.', 'wp-strava' );
+	}
+
+	/**
+	 * @param string $mps 
+	 * @return string mph
+	 */
+	public function speed( $mps ) {
+		return number_format( $mps * 2.2369, 2 );
+	}
+
+	public function get_speed_label() {
+		return __( 'mph', 'wp-strava' );
+	}
+
+	/**
+	 * @param string $m meters
+	 * @return string feet
+	 */
+	public function elevation( $m ) {
+		return number_format( $m / 0.3048, 2 );
+	}
+
+	public function get_elevation_label() {
+		return __( 'ft.', 'wp-strava' );
+	}
+}