switched from 'find_in_set' to 'like' as 'find_in_set' slows down extremely on the high frequency database

Updated example 1 to illustrate how to use the logical statements for SQL query

add examples 1 and 2

See merge request !3

Workflow

See merge request mikf/V52!1

- data from SQL
- data from file
- dump data
- bin data. Option to chose bin sizes or number of bins.
- add statistical value based on timeseries to data-set
- plot windrose
- both statistics and timeseries database compatibility
- password read from binary
- start stop correctly gets values across months and years incl. seconds and minutes