database schema respects the default currency

when default currency is changed. the amount column in the database
has a postfix of the subunit of the currency so set

likewise for the currency column as well. It also changes the
default value to the currencies iso code

add gem debugger for ruby 1.9 on MRI ruby

fix two failing tests where the default_currency is set to EUR
in spec/dummy/config/initializers/money.rb
Merge pull request #75 from deepak/feature/support-inr-paise

database schema respects the default currency
Fix typo in method name and README
Merge pull request #81 from bryanrite/master

Fix Typo in Method Name
Reset global settings to avoid unexpected behavior
Fix test by disabling I18n default