Settings split according to chart

routes/api.js
   - check type of sensor
   - translate error message

app.js
   - debug = false at i18n

public/javascripts/chart_utilities.js
   - setter/getter for current Tab

public/javascripts/global.js
   - settings dialog completely rearranged
   - if only sensorid is given, check type

routes/index.js
   - set language to global variable

views/index.pug
   - reaggange settings dialog
   - translate 'Error'

views/layout.pug
   - load new datepicker (vanillajs-datepicker)

public/javascripts/map.js
   - fetching from server refactored to function
   - reenable tabs after leaving map

charts/preparecharts
   - typo

public/javascripts/showcharts.js
   - loadAll extended to  load also live and map

public/stylesheets/style.sass
   - a few changes for settinds dialog

locales/[de|en]
   - added a few words

charts/utilities.js
   - setter and getter for language

public/stylesheets/style.css

@@ -201,7 +201,7 @@ footer #author #versn {
 }
 
 #nbrofdays, #peaklim, #olderthan {
-  width: 10%;
+  width: 13%;
 }
 
 .addit {
@@ -244,7 +244,7 @@ footer #author #versn {
   background-color: #FFFFFF;
 }
 
-#sellan {
+#stday, #nbday, #pklim, #odth {
   display: none;
 }