organization and updated examples

* Split each different example into its own chapter for easier
maintenance. Should also make it easier for people to find and use
examples. (2013.03.17)
* Added equation macro along with new command to include code bits
directly in the project. Improved `build.bat` to allow for more defaults
to be set, saving key presses. Improved page height and margin
calculations. (2013.03.16)
* Demo of previous new features, improvement to `build.sh` to bring it
up to date with `build.bat`. Added an example .eps file to show
postscript integration works (2013.03.03).
* New functions to make list creation easier, improve the default
`\href` function, \answer function for document-wide switching on/off of
specific text (useful for answer keys), and much more. Improvement to
multifig to allow better detection of different inputs and adjust
formatting accordingly (2013.02.23).