minor grammar updates to problems it fixes section
updating alternatives and addiing a placeholder to work up ports and adapters stuff to put in. Correcting spelling of 'up front' to 'upfront'
moving the summary section of alternatives to the placeholder document. Will put it back in when it's finished
Merge branch 'master' of https://github.com/tobyweston/essential_acceptance_testing

Conflicts:
	manuscript/part2/problems-it-fixes.md
Merge branch 'master' of https://github.com/tobyweston/essential_acceptance_testing

Conflicts:
	manuscript/part2/problems-it-fixes.md
a little more on Yatspec