minor changes to add documentation and fix documentation issues

DESCRIPTION

@@ -24,6 +24,7 @@ Imports:
     lubridate,
     paletteer,
     purrr,
+    ranger,
     reshape2,
     rlang,
     scales,

NAMESPACE

@@ -2,6 +2,7 @@
 
 export(check_options_graph)
 export(convert_string_to_list)
+export(create_and_train_model)
 export(create_config)
 export(enrich_dates)
 export(enrich_name)
@@ -22,38 +23,52 @@ export(gg_car_speed_v85)
 export(gg_traffic_avg)
 export(gg_traffic_evolution)
 export(import_sensor)
+export(impute_missing_data)
 export(is_vacation)
 export(melt_direction_mode)
 export(preprocess_car_speed)
 export(retrieve_sensor)
 export(seq_by_3_month)
 export(set_global_vars)
 export(set_telraam_token)
+export(validate_and_preprocess_data)
 export(write_update_data)
 import(dplyr)
 import(ggplot2)
 import(paletteer)
 importFrom(dplyr,"%>%")
+importFrom(dplyr,arrange)
 importFrom(dplyr,between)
 importFrom(dplyr,bind_rows)
 importFrom(dplyr,filter)
 importFrom(dplyr,left_join)
+importFrom(dplyr,select)
 importFrom(httr,GET)
 importFrom(httr,POST)
 importFrom(httr,VERB)
 importFrom(httr,add_headers)
 importFrom(httr,content)
 importFrom(jsonlite,fromJSON)
+importFrom(lubridate,day)
 importFrom(lubridate,days)
 importFrom(lubridate,hour)
+importFrom(lubridate,minute)
+importFrom(lubridate,month)
+importFrom(lubridate,wday)
+importFrom(lubridate,week)
+importFrom(lubridate,year)
 importFrom(lubridate,ymd)
 importFrom(lubridate,ymd_hms)
 importFrom(paletteer,scale_fill_paletteer_c)
 importFrom(purrr,map_dfr)
 importFrom(purrr,pmap)
+importFrom(ranger,ranger)
 importFrom(reshape2,melt)
 importFrom(rlang,.data)
 importFrom(scales,percent)
+importFrom(stats,complete.cases)
+importFrom(stats,na.omit)
+importFrom(stats,predict)
 importFrom(stats,setNames)
 importFrom(stats,weighted.mean)
 importFrom(tidyr,drop_na)