minor cleanup
Improve logging in harel fetcher + some fixes to common-fetching.
Harel-fetcher: Fix half-auto fetching of problematic funds.
License credit update.
add more xlsx file format handlling
handle non scraping providers in common fetcher
add fetch known to fetch all providers
improve validator
+fix validator to better detect fair_value;+better tab detection for psagot
filter non number yield values
fix bug
+fix number parsing bug;+fix bug when file is called twice
cleanup
improve string cleaning for escaping quotes and numbers
improve xlsparser handling for empty sheets
fix bug
 add support for parsing files directly from a dir
load files in a rate of two at a time;+fix parsing regex;+add instrument sub type string fixing
clean instrument type string
fix string and integer cleaners for output