readme: added information on how to generate the escape character

Make sure that users understand that on  different kayboard layouts you will have different ways of generating the escape character
app-container: remove smart quotes

Thanks to Eric who reported this to me over email.
Merge pull request #204 from philips/remove-smart-quotes

app-container: remove smart quotes
Fix table formatting
Merge pull request #206 from vsekhar/patch-1

appc/spec: fix table formatting
readme: small changes to make the escape character generation look better

Changed it to proper code spans
Merge pull request #192 from virtualswede/master

readme: added information on how to generate the escape character
appc: remove remaining smartquotes in spec
cas: use tmpdir for tests
Merge pull request #207 from jonboulle/cas_test_tmp

cas: use tmpdir for tests
Merge pull request #211 from jonboulle/fix_quotes

appc: remove remaining smartquotes in spec
appc/spec: minor tweak to mountpoints