Removed Zombies directory
Merge branch 'develop' of git://github.com/byuimpact/numerical_computing into develop

Conflicts:
	Vol4.tex
Modified Vol4.tex
Added lab on Heat Equation
Merge branch 'develop' of git://github.com/byuimpact/numerical_computing into develop

Updating develop branch
Added SIR lab and first Pseudospectral lab
Modify Vol4.tex
Modified Vol4.tex
Adding lab on the wave equation
Add draft of second finite difference lab for the 2d heat equation and Poisson's equation
Merge pull request #556 from joshualy/develop

Added labs on the heat equation, SIR models, and the pseudospectral method.
Merge branch 'WaveEqn' into develop

Adding lab on the wave equation
Merge branch 'poisson' into develop

Adding lab on finite difference method for 2d problems
Merge pull request #557 from joshualy/develop

Added labs on the wave equation, and finite difference methods for 2d heat equation, poisson's equation
Merge branch 'develop' of https://github.com/byuimpact/numerical_computing