Add setup script for fish shell

setup.fish

+#!/usr/bin/fish
+
+function update_path -d "Remove argv[2]argv[3] from argv[1] if argv[2], and prepend argv[4]"
+   # Assert that we got enough arguments
+   if test (count $argv) -ne 4
+      echo "update_path: needs 4 arguments but have " (count $argv)
+      return 1
+   end
+
+   set var $argv[1]
+
+   set newpath $argv[4]
+   for el in $$var
+      if test "$argv[2]" = ""; or not test "$el" = "$argv[2]$argv[3]"
+         set newpath $newpath $el
+      end
+   end
+
+   set -xg $var $newpath
+end
+
+
+if set -q HCANALYZER
+  set old_hcanalyzer $HCANALYZER
+end
+
+if set -q ANALYZER
+  set old_analyzer $ANALYZER
+end
+set -x HCANALYZER (realpath (dirname (status -f)))
+set -x ANALYZER $HCANALYZER/podd
+
+update_path LD_LIBRARY_PATH "$old_hcanalyzer" "" $HCANALYZER
+update_path LD_LIBRARY_PATH "$old_analyzer" "$HCANALYZER" $ANALYZER
+update_path DYLD_LIBRARY_PATH "$old_hcanalyzer" "" $HCANALYZER
+update_path DYLD_LIBRARY_PATH "$old_analyzer" "$HCANALYZER" $ANALYZER
+