Corrects RubyGem badge name and URL
Merge pull request #55 from sgerrand/corrects-rubygem-badge

Corrects RubyGem badge name and URL
Update api.rb

Add get_products_count method back
remove trailing slash on url for get_products_count
remove trailing slash on url for get_categories_count

Trailing slash is resulting in 404 response.
Merge pull request #56 from alexnesbitt/master

Reinstate get_products_count method
Added get_options_count method
added get_optionsets_count
Add get_brands_count method
add methods to get a product's related rules,skus, options, videos, discountrules, configurable fields, and 

used format get_product_(foo)s to get all foos for a single product
left get_products_(foo)s to get all foos for all products
Add get_optionset_options method to get options for a single optionset
Add delete_brand method
Correct missing paren in delete_brand
Creates not providing response.  Added support for 201 response code for a create
Correction to make create api call return response on 201 code
Add delete_category method
add delete_optionset method
Add delete_option method
Merge pull request #57 from alexnesbitt/master

Added get_options_count method