* Update samples for several languages.
Just whitespace changes and some reordering where the order doesn't matter.
* Adding generated .swagger-codegen/VERSION files.
* Added mustache file for namedCredentials
* Removed Basic and OAuth from Apex API in favor of NamedCredentials
* Moved old README to README for ant deployment
* Added SFDX OSS descriptor
* Removed remoteSite mustache
* Changed package.xml from RemoteSite to NamedCredential
* Update ApexClientCodegen to support SFDX and namedCredentials
* Created initial README for Salesforce DX
* Ran Petstore test for Apex commit
* Fixed error in README mustache