authorisation and statefulness

• add session meta data / headers
• add session system answers, QTYPE_META
• add authentication middleware support
• add session states (NEW,OPEN,FINISHED,CLOSED)
• add basic valgrind support
• add basic index page handler to fcgi
• add add hook for generic analysis implementation
• improved logging
• added deploy script (lighttpd fastcgi)
• bumped Python C Api to 3.8.x
• various changes and improvements to test runner, added directives, lighttpd templates
• added fastcgi POST /nesession and support for accepting external session uuids
• add license (@wall0159)
• add session progress counter for generic and python