right-associative implicit call: a.b c.d 10 -> a.b(c.d(10))
use constructor to define implicitSymbol
generate verbatim javascript code
Fix issue #34 (empty line after do).
Merge branch 'master' of github.com:massimiliano-mantione/metascript
Merge pull request #33 from drslump/implicit-call

right-associative implicit call
Merge pull request #39 from drslump/js-macro

generate verbatim javascript code
Renamed js macro as #js to avoid potential name claches.