Added support for Glances API and completly reworked API

src/main/java/de/svenkubiak/jpushover/enums/Param.java

@@ -0,0 +1,39 @@
+package de.svenkubiak.jpushover.enums;
+
+/**
+ *
+ * @author svenkubiak
+ *
+ */
+public enum Param {
+    ATTACHMENT("attachment"),
+    CALLBACK("callback"),
+    DEVICE("device"),
+    EXPIRE("expire"),
+    HTML("html"),
+    MESSAGE("message"),
+    PRIORITY("priority"),
+    RETRY("retry"),
+    SOUND("sound"),
+    TIMESTAMP("timestamp"),
+    TITLE("title"),
+    TOKEN("token"),
+    URL("url"),
+    URLTITLE("urltitle"),
+    USER("user"),
+    TEXT("text"),
+    SUBTEXT("subtext"),
+    COUNT("count"),
+    PERCENT("percent");
+
+    private final String value;
+
+    Param (String value) {
+        this.value = value;
+    }
+
+    @Override
+    public String toString() {
+        return this.value;
+    }
+}