Handle conditions within object child nodes

[greyblake]

Hi! Thanks for the nice gem!
Here is the fix for an issue, I've detected couple hours ago: #38

To make selector be correctly applied for a Hash object, it should be treated slightly differently than an array object: it should not reassign @_current_node, so current node should be still the same hash.

[greyblake]

P.S. I you decide to merge the PR, can you please publish a new version on rubygems?:)

[greyblake]

The specs fail for ruby 1.9.x

Fetching gem metadata from http://rubygems.org/..............
Resolving dependencies...
Using rake 11.1.2
Using bundler 1.7.6
Using callsite 0.0.11
Using rainbow 2.1.0
Using multi_json 1.11.3
Using minitest 2.2.2
Using phocus 1.1
Using dirge 0.0.5
Using code_stats 0.0.1
NoMethodError: undefined method `spec' for nil:NilClass
An error occurred while installing jsonpath (0.5.8), and Bundler cannot
continue.
Make sure that `gem install jsonpath -v '0.5.8'` succeeds before bundling.
The command "eval bundle install --jobs=3 --retry=3" failed 3 times.

Is there a chance to merge this PR, @joshbuddy ?