Merge pull request #20 from rustyconover/master

Work on Invoices, metadata, error handling, and a bug fix with customer's trial_end.
Merge pull request #21 from rustyconover/master

Change to using Dist::Zilla and start with provisionary version 0.009
Merge branch 'master' of github.com:lukec/stripe-perl
Remove duplicated trial end.  Allow it to be an int or string,
because of the special "now" value.
add $customer->discount->coupon attributes
Merge pull request #23 from andrewsolomon/master

add $customer->discount->coupon attributes
Fix documentation, add abstracts to all modules.

Finish moving to Pod::Weaver.
Add README.pod which is generated from Dist::Zilla.
A few POD fixes and 0.11 release.
Remove use of methods module, replace with MooseX::Method::Signatures.

Fixes a problem with methods module prereqs on some platforms while retaining
all functionality.

Bump version