added template option to use other templates

USAGE: rails generate chanko sample --template=YOUR_CUSTOM_TEMPLATE_PATH
fixed typo
Support erb template file
Kill deprecation warnings in rspec test examples
Fix rspec's version
Fix Chanko::Unit.__eager_paths so that it works as expected
(and fix a memory leak)
s/_path/path/
Merge pull request #17 from mirakui/eager_paths

Fix Chanko::Unit.__eager_paths so that it works as expected
documentation updates
documentation updates
Merge pull request #18 from cwabbott/master

documentation updates
Merge pull request #12 from ma2gedev/use_other_templates

Added template option to use other templates.
Merge pull request #13 from ma2gedev/support_erb_template

Support erb template file
Merge pull request #15 from makimoto/kill_deprecation_warnings

Kill deprecation warnings in rspec test examples
Allow omitting `:locals` key in invoke
Modify README.rdoc
Merge pull request #16 from makimoto/omit_locals_opt
Add jeweler to development_dependency

$ bundle exec rake -T shows below:
Jeweler not available. Install it with: sudo gem install
technicalpickles-jeweler -s http://gems.github.com
Merge pull request #19 from sanemat/fix/jeweler

Add jeweler to development_dependency
Support slim template file

Add slim template