Update README.md

Change example URL to remove reference to ADL LRS
Replace placeholder with actual url of base repo
Put definitions in alphabetical order

Hopefully this should make definitions easier to find. 
Change and add definitions
test commit
Revert "test commit"

This reverts commit 301af4c41e59972957335e3fab172c57df483257.
notepad ++ test
Revert "notepad ++ test"

This reverts commit 9bf85ae73d75185ee71b0e38713e2e9ea3b3c741.
in readme replace garemoko with <your username>
Merge pull request #4 from garemoko/master

changes to readme
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec
Change to specify the base repository for this read me
Merge pull request #5 from aaronesilvers/master

Change to the readme to include the base repository for xAPI-Spec
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec
changing to formatted text so that <your username> appears
Merge pull request #1 from adlnet/master

get changes back from master
Merge pull request #6 from aaronesilvers/master

changing to deal with <your username> into preformatted text
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec
Update .gitignore

ignore html files created by some markdown editors
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec
added disclaimer about mac