testing.txt: Clean up text.
testing.txt: Fix subsubsection delimiters.
testing.txt: Add instructions about ICE_CONFIG.
testing.txt: Correct style and add Sphinx keyword.
testing.txt: Correct syntax and spelling.
testing.txt: Use inline Sphinx syntax.
testing.txt: Oxfordise the list syntax.
testing.txt: Change order of text, update syntax.
testing.txt: Clarify text meaning.
index.txt: Correct typos on landing page.
Unify command to set web server.
Merge pull request #463 from bpindelski/typos

Fix typos on landing page
Merge pull request #464 from jburel/install-web

Unify command to set web server.
Merge pull request #455 from bpindelski/testing-clean

Clean up testing.txt