Echo JS 0.11.0

The use of eval makes me uneasy, there are solutions that don't use it[1]

[1] : https://github.com/kolodny/nester

- Parameters are currently assumed to be from a safe source (works for many use-cases, but yes, it is something to be wary of).

- The eval access is supposedly more efficient (as polymer guys claim, but I'm not aware of a benchmark)

- Unlike the 'nester' lib and many others, this key-path lib is designed to separate the path input processing (mainly parsing) from object access. This allows for caching/memoizing and for treating the paths as comparable objects (e.g., checking if 'prop[3]'==='prop["3"]').