Removed dead and unused code
Some minor bugfixes
Added null initialization for member pointers that previously were not initialized on object construction
Merge branch 'master' into bug-hunting

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Fixed Mime class not overwriting virtual function configure from its base class Component, removed .dirstamp files
add unused switch-cases back to reduce compiler warnings
use configure flag --enable/--disable for server, sdk and demos and disable building demos by default
move and rename directory sdk/demos to demo
fix building dist package
Merge branch 'master' of https://github.com/maekitalo/tntnet