libgphoto2-2.5.x and node-10.x compatibility
pthread_mutex -> uv_mutex #10
Updated README
Updated dependencies, moved example scripts out of test folder
Added series example
Dependency checking
Added JPEG header check
Added experimental logging handler

only use during development, as there might be some leaks :)
refactored old EIO_* function names
Refactored JPEG header check
Merge pull request #30 from lwille/feature/libgphoto2-2.5.x

Maintenance release 0.1.2 closes #10 #26