particle_filter.py learns --timeout (defaulted to 0.0s).
Merge branch 'master' of https://github.com/nssh/particle-filter into nssh-master

Conflicts:
	particle_filter.py
Merge branch 'nssh-master'
Add a utility to draw fov boarder
Plot fov and history of estimated diver particle
Remove unnecessary function arguments and few nits
Add a geo utility for adding offsets to lat/lons
Move plotting to utils
Save figures and minor refactorings
Update gitignore to discard image directory