add space after full stop
Update upgrade.md with more detail

Added notes about operations to functions and passing as vars.
Merge pull request #11 from zenogantner/patch-1

add space after full stop
Merge pull request #12 from chetmancini/patch-1

Update upgrade.md with more detail
Update Impatient Cascalog link to new address
Merge pull request #13 from mathias/patch-1

Update Impatient Cascalog link to new address
added some version-specific info around 'Duplicate elimination' in marz_intro_2.md
remove errant paste
Merge pull request #15 from sirobinson/gh-pages

cascalog 2.0 distinct behaviour
Add Intent Media and update broken images for some other companies
CM: add some more detail and fix broken list in markdown