Merge pull request #55 from lgeek/master

Replace -march with -mcpu for more hardware-specific optimisations
Changed Php to hhvm, added fortran
fixed typo in runscript
updated
updated
squeeze out some more speed by using pair aliases instead of defining new structs
Merge pull request #56 from philnguyen/improve-racket

squeeze out some more speed by using pairs instead of new structs
updated
updated
updated
updated
Merge branch 'master' of https://github.com/logicchains/LPATHBench