Update nodent to latest version

Fixes a range of edge cases related to try-catch, strict mode and location of package.json options.

Implement 'spec' option

Note minor bump since the spec option requires noRuntime and therefore nodent v3.

Fix `export` declarations

Don't attempt to hoist exported named declarations
Correctly identify Babel types Object/ClassMethod as scopes to avoid illegal mappings

Thanks to @dessaya for finding this case
Fixes #12

ES6 destructuring and export async fixes

Bump nodent for:

• Fix issue with non-trivial destructuring assignments (fixes #8 - thanks to @simonbuchan)
• Fix case where single line exported function was incorrectly hoisted with no reference (fixes #7 - thanks to @simonbuchan, @naturalethic and @nightwolfz)

Object spread support

Implement parsing for proposed ES7 Object spread var {a,b,...x} = y ; used in Babel (see #6)

Specify runtime inclusion rules.

Update to allow for much more specific rules for including the nodent runtime in compiled files. See README.md for more details.

Improved README. Bump to Nodent 2.5.0

6.0.19

Improve README

Fix issue with babel>=6.5.0. Bump Nodent to 2.4.0

Remove location information from the runtime as Babel >=6.5.0 does a search by location and barfs if multiple nodes appearantly occupy the same source locations.
Bump nodent - see https://github.com/MatAtBread/nodent#changelog v2.4.0 for details

Correct ESTree async Property bug. Add optional compiler flags

6.0.2

Bump acorn-es7-plugin & nodent to improve ESTree compliance