removing some old figures and other files
Added a warning about out of bounds array access in the Cython lab.
Merge branch 'master' into typofixes
Merge branch 'master' into typofixes
Lab: Crime Mapping

Use Gaussian Mixture Models and Kernel Density Estimates
Lab: Earthquakes

Cluster the epicenters of earthquakes via the k-means algorithm
Lab: Bayesian Search

Understand how Bayesian methods can be used for search and rescue
operations.
Lab: Bayesian Updates

Understand the basic principles of computing a posterior distribution
from a prior and data.
Lab: CDHMM Generation

Understand the formulation of Continuous Density Hidden Markov Models
and how to simulate from them.
Lab: Russian Alphabet

Understand how to use Unicode characters in Python and to identify
Russian vowels and consonants.
Lab: HMM Parameter Estimation

Understand how to estimate HMM parameters via the Baum-Welch algorithm.
Lab: HMM State Estimation

Understand how to implement forward-backward algorithm for HMM state
estimation.
Lab: Principal Component Analysis

Understand the basics of principal component analysis
add lab to Vol3
fix image filenames
add hmmstates and fix compile issue
added lab
fix compile errors
add russian alphabet lab
added cdhmm lab