Initialize db conn with PDO
Catch constructor exceptions
Syntax err
Exceptions are objects too
Changed text concat
Testing with sqlite2 instead...
Revert "Testing with sqlite2 instead..."

This reverts commit 56d6335c9d0d233f6a828e90c2bde11dd98f4b99.
Adapted several queries to PDO
Corrected db fetch argument
Adapted status page to PDO
Adapted results page to PDO
Minor adjustment to result page
Right-align table headings on result page
Sample database (empty) and new path to database file outside web root
Launcher use sqlite3 instead of sqlite2
Launcher needs Queue and threading, even though asyncfilereader imports them
Fixed init of queues
Adjusted paths in launcher
Merge branch 'feature-PDO' into develop