enable components at runtime + grabber refactoring (#160)

* implement enable/disable on runtime for:
- smoothing
- kodi
- udplistener
- boblight

* implement enable/disable for forwarder
refactor component

* - implement grabber enable/disable at runtime
- big grabber refactoring. now with common base class for all grabbers

* implement enable/disable at runtime for bb detector

* osx fix

* try to fix cutted travis output for osx build

.travis/travis_build.sh

@@ -10,8 +10,8 @@
 # compile hyperion on osx
 if [[ $TRAVIS_OS_NAME == 'osx' ]]
 then
-    procs=$(sysctl -n hw.ncpu | xargs)
-    echo "Processes: $procs"
+	procs=$(sysctl -n hw.ncpu | xargs)
+	echo "Processes: $procs"
 
 	mkdir build || exit 1
     cd build