latex: Changes to slides and handout before and after class.

vcs: Remove all mention of use of -ve revision numbering. The introduction seems forced. It's a neat trick, but doesn't fit into the flow of things. Now introducing revision numbering with the need to take diffs between particular commits. Also mention -v and -l parameters to the log command.

vcs: Change email id to fossee from gmail.

vcs: Minor fixes to handout. 1. Made madhu's commit shorter to fit in one line. 2. Change Author details to have just the Name. 3. Change some punctuation.

vcs: Add details about -u, -m parameters to commit Changes correspond to changes made to handout in previous commit.

vcs: Introduce commit with -u and -m parameters commit is now introduced with -u and -m parameters. This fixes a couple of problems -- 1) hg sometimes doesn't allow commits without username 2) vi(m) is the default editor -- most people can't use it (yet).

vcs: Fix tiny indentation problem in handout.

vcs: Add include directive for exercises in handOut.

vcs: Fix pygments highlighting of code blocks with $ and ' Pygments highlighting breaks when a code block ends with a lone $ on a line or when it has an unmatched '.

vcs: Add highlight directive to handout.rst Sphinx uses highlight directives, which can be passed on, to Pygments for syntax highlighting.