fixed sql-prepare of POST '/descstasks'
fixed sql-prepare in some places
min fix mu and less struct
min fix main menu
fixed ``$stmt->execute()`` in PUT '/task/:id'
fixed bindParam ``$stmt->execute()`` in some places
Merge pull request #7 from lemind-timer-secure-fixes/mysql_improvement_fixes_part2

Mysql improvement fixes part2
fix header template: using meta-tag for javascript data
Merge pull request #8 from lemind-timer-secure-fixes/template_data_fixes

fix header template: using meta-tag for javascript data