Fix typos, syntax and replace is_decimal with is_float.
Update how hhvm config is set on travis-ci
Merge pull request #546 from richardmiller/fix-travis-hhvm-issue

Update how hhvm config is set on travis-ci
Merge pull request #537 from kkitson/documentation-corrections

Fix typos, syntax and replace is_decimal with is_float.
Merge remote-tracking branch 'upstream/master' into sort-psr4-folder-structure-for-specs
Merge branch 'sort-psr4-folder-structure-for-specs' of github.com:richardmiller/phpspec into sort-psr4-folder-structure-for-specs