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

locales/de/translation.json

@@ -41,6 +41,7 @@
   "Version": "Version",
   "from": "vom",
   "RemoveFromMap": "Sensoren nicht anzeigen, die nicht gesendet haben seit",
-  "weeks": "Wochen"
-
+  "weeks": "Wochen",
+  "ESYSCALL": "Fehler vom Serveraufruf: ",
+  "Error": "Fehler"
 }

locales/en/translation.json

@@ -41,5 +41,7 @@
   "Version": "Version",
   "from": "from",
   "RemoveFromMap": "Don't show sensors that have not sent for",
-  "weeks": "weeks"
+  "weeks": "weeks",
+  "ESYSCALL": "Error from Syscall: ",
+  "Error": "Error"
 }