Use Stripe library as regular files, not submodule

.gitmodules

@@ -25,6 +25,3 @@
 [submodule "site/plugins/field-selector"]
 	path = site/plugins/field-selector
 	url = https://github.com/storypioneers/kirby-selector
-[submodule "site/plugins/shopkit/gateways/2-stripecheckout/stripe-php"]
-	path = site/plugins/shopkit/gateways/2-stripecheckout/stripe-php
-	url = https://github.com/stripe/stripe-php.git

site/plugins/shopkit/gateways/2-stripecheckout/stripe-php/.coveralls.yml

@@ -0,0 +1,4 @@
+service_name: travis-ci
+src_dir: .
+coverage_clover: clover.xml
+json_path: coveralls-upload.json

site/plugins/shopkit/gateways/2-stripecheckout/stripe-php/.gitignore

@@ -0,0 +1,14 @@
+# Mac OS X dumps these all over the place.
+.DS_Store
+
+# Ignore the SimpleTest library if it is installed to /test/.
+/test/simpletest/
+
+# Ignore the /vendor/ directory for people using composer
+/vendor/
+
+# If the vendor directory isn't being commited the composer.lock file should also be ignored
+composer.lock
+
+# Ignore PHPUnit coverage file
+clover.xml

site/plugins/shopkit/gateways/2-stripecheckout/stripe-php/.travis.yml

@@ -0,0 +1,17 @@
+language: php
+
+php:
+  - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+  - 7.0
+  - hhvm
+
+env:
+  - AUTOLOAD=1
+  - AUTOLOAD=0
+
+script: ./build.php ${AUTOLOAD}
+after_script: ./vendor/bin/coveralls -v
+sudo: false