Add rudimentary types for the Extended Kalman Filter formulation
Add note about Julia Kalman filter implementations
Fix typo
Replace Travis and Coveralls badges which disappeared in a recent commit
Ignore backup files
Add basic conversion for Observations
Merge branch 'master' into ekf
Finish Extended Kalman Filter implementation and add tests.
Fix naming conventions in src/filter.jl
Distributions isn't needed, but ForwardDiff is now for EKF
Add usage example to README
Update the notebook a bit
Add some figures
Correct syntax highlighting in README
Try the figure updates again
Add Roadmap to README
Refactor types to remove awkward KFP types.

Now we monitor whether the prediction step has occured
with a Bool in the type.

This lets us have predict!, and update! functions.

Update tests so they pass with the new tests.

Needs tests for the new functions
Remove old types and export new methods and types.

Use EKF in parent module
Tests for new methods
Ignore sandbox directory
Merge branch 'master' into tasks

Conflicts:
	src/Kalman.jl
	src/filter.jl
Basic Reactive.jl integration