Refactors travis building

Tools (tgui and changelog) are split out into their own build and are not
installed/built in the standard per map build, this should give developers
better visibility on if it's a tool breakage, or their code is faulty

This also moves most of the travis related scripts into a single folder
this is entirely for sanity reasons, they've also all be made user
executeable

tools/travis/before_build_byond.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -e
+
+#If this is the build tools step, we do not bother to install/build byond
+if [ "$BUILD_TOOLS" = true ]; then
+  exit 0
+fi;
+
+if [ -d "$HOME/BYOND-${BYOND_MAJOR}.${BYOND_MINOR}/byond/bin" ];
+then
+  echo "Using cached directory."
+  exit 0
+else
+  echo "Setting up BYOND."
+  mkdir -p "$HOME/BYOND-${BYOND_MAJOR}.${BYOND_MINOR}"
+  cd "$HOME/BYOND-${BYOND_MAJOR}.${BYOND_MINOR}"
+  curl "http://www.byond.com/download/build/${BYOND_MAJOR}/${BYOND_MAJOR}.${BYOND_MINOR}_byond_linux.zip" -o byond.zip
+  unzip byond.zip
+  cd byond
+  make here
+  cd ~/
+  exit 0
+fi
+
+#some variable not set correctly, panic
+exit 1