Add Nikola build dependencies for Mac (#134)

common/configure_fresh_system.sh

@@ -192,11 +192,9 @@ if [[ -z $NO_GO ]]; then
     go get -u github.com/exercism/cli/exercism
 fi
 
-echo "Installing Reveal-md"
-# talks: reveal-md
 $SUDO npm install -g reveal-md
-echo "Installing fancy differ"
 $SUDO npm install -g diff-so-fancy
+$SUDO npm install -g cssnano
 
 if [[ -z $NOPYTHON3 ]]; then
     set +e

macosx/up.sh

@@ -33,7 +33,6 @@ brew install \
   watch \
   zsh
 
-
 brew install \
   coreutils \
   curl \
@@ -70,13 +69,16 @@ brew install \
   sqlite \
   tidy-html5 \
   doxygen \
-  go
+  go \
+  optipng \
+  jpegoptim
 
 brew cask install gimp
 brew cask install iterm2
 brew cask install docker
 brew cask install appcode
 brew cask install adium
+brew cask install kdiff3
 
 brew services start syncthing