fixed some issues with pyplot/OO API usage in 3D examples. Fixed annimation example on ubuntu 14.04
removed reference to the --pylab command line argument (closes #18)
Fixed spelling error. Closes #19. Thanks @yuvallanger , I appreciate it!
Fixed typo. Thanks again @yuvallanger, closes #20
Lecture-5-Sympy: Add missing verb 'use'

Replace 'we can the' with 'we can use the'
Merge pull request #21 from ozancaglayan/patch-1

Lecture-5-Sympy: Add missing verb 'use'
updated section headers from markdown to header cells
updated image urls
files for building a pdf that includes all notebooks
added link to the PDF file
fixed typos expect.. -> except.. Thanks @DigNeurosurgeon Closes #22
Merge branch 'master' of https://github.com/jrjohansson/scientific-python-lectures
Merge pull request #1 from jrjohansson/master

update my fork