Docblock fixes

[Http] Fixing issue related to nested POST data. Resolves guzzle#20

Adding support for URI templates

[Http] UriTemplate syntax supports {} or {{}} for backwards compatibility.
[Http] Guzzle::inject() now allows {} or {{}} injection for consistency.
[Http] BC: removing Guzzle\Http\Client::inject and now using Guzzle\Http\Client::expandTemplate.
[Http] Can use a custom syntax for URI templates (this might be useful for something like Solr because Solr actually uses {}).
[Http] Adding the ability to inject a custom UriTemplate into clients or just use the default UriTemplate
[Http] You can now use an array when creating a request via a client to specify a URI template and additional template variables.
[Service] Adding support for URI templates to service descriptions.
[Service] [BC] removing Guzzle\Service\Description\ApiCommand::getPath() and replacing it with getUri().
[Service] Use "uri" instead of "path" when creating service descriptions.  However, there is still backwards compatibility with the "path" attribute.

[Service] Making the integer and float service description types acce…

…pt numeric strings

[Http] Using CURLOPT_INFILESIZE instead of Content-Length headers. Th…

…is prevents chunked transfer encoding when the Content-Length is known. Adding better test coverage.

[Http] Fixing issue that caused two Content-Length headers. Adding be…

…tter test coverage for Content-Length and chunked Transfer-Encoding. Removing some duplicate tests.

Removing @ error suppression from CurlHandle and instead checking if …

…the handle is a resource before doing any curl related calls. Making the JsonDescriptionBuilder more readable.

Coding standards

[Http] Adding OAuth 1.0 signature plugin

[Service] Fixing headers set using an array on commands via the const…

…ructor

Removing special handling of ClosureCommand
Throwing an exception when required parameters are missing from a dynamic command
Pass ApiCommand objects to a ClosureCommand in the second argument of the constructor, not in the api_command parameter key
Adding Guzzle\Service\Command\DynamicCommand that will prepare HTTP requests based on an API command. Extend this class for advanced response processing for API commands.
Making DynamicCommand the default command for ApiCommands
Removing the old DynamicCommandFactory and replacing with a simpler ApiCommandFactory