testing.txt: Correct syntax and spelling.
testing.txt: Use inline Sphinx syntax.
fix developer CI page titles
testing.txt: Oxfordise the list syntax.
README: Document TeX setup
README: Remove contractions
README: Add setup section
README: Command-L isn't needed to change location
Merge pull request #453 from hflynn/rebased/dev_4_4/java6min_develop

Making Java 1.6 minimum version required (rebased onto dev_4_4)
merge dev_4_4 -D org -I include -E exclude: PR 261 (Generate PDF using XeLaTeX)
merge dev_4_4 -D org -I include -E exclude: PR 368 (Cpp: Correct content and markup)
merge dev_4_4 -D org -I include -E exclude: PR 451 (Update Homebrew installation page to expose Ice 3.4 as the default version)
merge dev_4_4 -D org -I include -E exclude: PR 454 (Expand the title of the "writing tests" page)
merge dev_4_4 -D org -I include -E exclude: PR 455 (Clean up testing.txt)
merge dev_4_4 -D org -I include -E exclude: PR 456 (Adjusted titles of continuous integration developer pages)