update introductory material in tour for m5
add section about values/functions and fat arrows
update for M5 syntax
remove explicit doc
improvements to new section
update chapter for M5
update to M5 syntax
new section on type inference and anonymous classes
refresh
Merge branch 'master' of https://github.com/ceylon/ceylon-lang.org into m5release
change the presentation of monospaced and code blocks
comment out distraction
oops
padding around bullet lists
fix monospace in lists
update chapter with new material on Iterable and Tuple
rename to Null
move a section
updates for M5
refresh