Squashed 'lib/Fenom/' changes from 0920284..9a16fbe

9a16fbe Merge branch 'fix-functions-args' into dev
eb1fa83 add tests for custom functions in template
803fd67 fix use var_export for default params in function (nulls and empty arrays broke templates)
d307c80 fix parsing of array param in function (was falling in endless loop)

git-subtree-dir: lib/Fenom
git-subtree-split: 9a16fbe21f0adfa09bcbc029c71c97ec821bfb27
updated fenom