Prepare charts moved from api server to here

route/api.js
   - new distriputer fpr chart preparation

appp.js
   - removed unnecessary calls

public/javascripts/map.js
   - changed /char/... call to /api/... call

charts/preparecharts
   - added

charts/utilities.js
   - added

public/javascripts/showcharts.js
   - changed /char/... call to /api/... call

routes/users.js
   - deleted

public/javascripts/map.js

@@ -165,7 +165,7 @@ export async function buildMarkers() {
         west: bounds.getWest(), south: bounds.getSouth(),
         east: bounds.getEast(), north: bounds.getNorth()
     }
-    const url = `/chart/getmapdata?type=noise&box=${bounds.toBBoxString()}`
+    const url = `/api/getmapdata?type=noise&box=${bounds.toBBoxString()}`
 
     let ret = await fetch(url)
         .catch(e => {
@@ -265,7 +265,7 @@ async function setCenter(adr) {
 
 // Show the last date below tha map grafics
 async function showLastDate(ld) {
-    const url = `/chart/getmapdata?type=noise`
+    const url = `/api/getmapdata?type=noise`
     let ret = await fetch(url)
         .catch(e => {
             console.log(e)