Remove outdated info about transport
Remove document types from spec

they now live under content/doctypes and will be updated with the MEP process
Move some files around

dissolve spec folder, put documentation about encoding in encoding/ subdir
Remove docs/OTContract.md docs/OTMessage.md as well

covered by other documents
Fix README, file names, references
Remove docs/ and spec/ from index.html
Merge pull request #129 from OttoAllmendinger/pr-delete-outdated

Delete outdated documents