Synchronize docs with current API of Zend\Http\Request

Fix code examples and "Available Methods" section
Fixed a stray typo character
Make case consistent: POST and HTTP
Synchronize docs with current API of Zend\Http\Response

- Available Methods
- Examples
Update Zend\Http\Headers documentation page

- Overview: reflect changes in API of Request/Response
- Move Examples section to bottom of page
Fixed table in section "List of HTTP Header Types"

 - Extended table rows with multiple methods listed to allow each to have it's own line
 - Updated entry for SetCookie to match current API
Removed ZF1 page on Zend_Http_Cookie and Zend_Http_CookieJar
Synchronize docs with current API of Zend\Http\Client

- Overview and Quick Start
- Configuration Options
- Available Methods
- Examples
Fix typo in 'rfc3986strict' option description
Updated documentation for Zend\Http\Client\Adapter\Socket

- Converted class name references to namespaces
- Fixed incorrect usages of Zend\Http\Client API
- Added missing configuration parameters
Updated documentation for Zend\Http\Client\Adapter\Proxy

- Converted class name references to namespaces
- Fixed incorrect usages of Zend\Http\Client API
- Corrected assertion that Digest authentication is unavailable
Fixed reference: Zend_Http_Client -> Zend\Http\Client
Retract statement that AUTH_DIGEST works, as it doesn't
Updated documentation for Zend\Http\Client\Adapter\Curl

- Converted class name references to namespaces
- Fixed incorrect usages of Zend\Http\Client API
Updated documentation for Zend\Http\Client\Adapter\Test

- Converted class name references to namespaces
- Fixed incorrect usages of Zend\Http\Client API
Updated "Creating your own connection adapters"

- Converted class name references to namespaces
- Change `setConfig` to `setOptions`
Partial update of Zend\Http\Client "Advanced Usage" section

- HTTP Redirections
- Adding Cookies and Using Cookie Persistence
Merge branch 'fix/http' of github.com:adamlundrigan/zf2-documentation into fix/http
Update docs/languages/en/modules/zend.http.request.rst

Applied my diff
Finished updating Zend\Http\Client "Advanced Usage" section

- Setting Custom Request Headers
- File Uploads
- Sending Raw POST data
- Basic HTTP Authentication
- Persistent Cookies
- Data Streaming (removed references to request streaming)