Template library and blog

WEBSITE - New Template library to search and download pre-built templates.

WEBSITE - New Blog covering SheetsFinance updates, tutorials and more.

New external links to international (non-US) filings for historicalFinancials functions.

Increase of max batch call limit to 5000 symbols.

Timezone bug fix for SF_TECHNICAL() function. Better handling of half-hour timezones.

Improved caching.

Correct date formatting for priceTargets