Add Fogus's slides.
Racket-y
more Rackety, useless exn msg
racket/network: improve UDP support

Generalize `udp-send-to`, etc., to try each possibility of
a resolved address (instead of just the first one) like
`udp-connect!` does. This matters, for example, when using
"localhost" as an address, when the machine resolves "locahost"
to both "127.0.0.1" and "::1", and when the socket is created
for the second one that would be tried.

Also, detect and discard asynchronous ICMP errors.
racket/gui Cocoa: fix test for 10.9
John's slides.
Only ask for multisampling of GLX 1.4 or higher; make getting context atomic
remove tests that combine outline mode with
pixel checking, as the behavior doesn't seem to be
guaranteed

also, rackety
remove 'print' mode from the Pretty Big language

it was buggy and fixing the bug makes it identical to write
mode, so instead of that, lets just make there not be a print mode

also, minor edits and Rackety
fix a bug that disabled check syntax's tooltips

bug was introduced in august 2013
add author and toc
add support for macro-specified tooltips to check syntax
remove equality to make the program easier to read

(in consultation with Jay)
new unix bitmaps for redex tests to sate drdr

thanks, Jay
fix UDP improvement for Windows
disable this file in 'raco test'
Use gl-config% multisample size as an upper bound instead of a lower bound
db: stick to ASCII for pg generated names
Change prose about RacketCon videos.
Added support for core OpenGL profiles in Linux (see `set-legacy?`)