Typography fix

Deprecated the use of Arial in favor of Monaco, one of the top 10
preferred fonts for coding present in every OSX. If not present, then
will come Helvetica, then any sans the OS wants.
pushing some css adjustments
Changed the code typograohy
Actually, DejaVu sans (not mono) turns out to be better for smalltalk code :)
manually integrte a2cd98eb66d79938dca7ae5bca68d1c9fbb335cc and 9c26804eb8c308cf7283c14b26ea9751e53be1fe from sebastian via nicolas. For some reason github, didn't think those two patches could be applied cleanly.
undo Sebastian's (and my) n00bness:)
Fix MNU when Transcript show: is sent but no Transcript has been opened yet
Fix Collection>>ifEmpty to match Pharo implementation has it did not return the bloc value + comments + tests
Merge remote-tracking branch 'upstream/master'
added amber-normalize.css in an attempt to un-clobber css changes in the rest of the page.
adding display:inline to .jtalkTool select, #jtalk input{} fixes my issue
Merge branch 'master' of https://github.com/NicolasPetton/amber
Better contrast on selected list elements (specially in cheap monitors)
Merge pull request #139 from sebastianconcept/master

This change gives you better contrast in "not that good" monitors
Merge pull request #138 from pdebruic/master

the method protocol and references selects can be pushed off the page
Merge pull request #137 from lolgzs/master

fix bugs
Generate accessors (getters/setters) in Browser (IDE)
Merge pull request #148 from soyrochus/setter-gen

Generate accessors (getters/setters) in Browser (IDE)
Better contrast on selected list elements (specially in cheap monitors)
Fix MNU when Transcript show: is sent but no Transcript has been opened yet