Remove Pratice 1.4 since it doesn't fit properly in any of the major sections
Adding brief mention of literate programming and associated citations
Adding examples of repetitive tasks to beginning of Section 2
Fix typo
Adding the need for institutional support to final paragraph.

Also includes the correction of some typos in the existing final sentence.
Clarify that example in DRY section is for geographic data
Shorten section on planning for mistakes

This section was far longer than any of the other sections and got
into a lot more detail. In addition, the editors specifically asked
us to remove the second level of headings, which wasn't tenable
without shortening the content.

Three subsections were removed entirely:

1. Use a variety of oracles. The spirit of this was encorporated
into the current language, but not the labeled practice itself.

2. Refactoring legacy code for testing. This should be moved to
the new 'What's next' section and the existing language has been
moved there for editing.

3. TDD. If we are going to keep this (and it is pretty equivocal at
the moment) we should move it to the new 'What's next' section and
the existing language has been moved there for editing.
Merge pull request #48 from ethanwhite/best-practice-first-rev

Start of revision for PLOS Biology