Improve extension possibilities and bugfixes

• Closes #43
• Closes #44

Improve extension possibilities

• Closes #40

Add encoding support for data in iterators

Designed to be used with Phalcon Framework

• closes #36

Bug fixes

• Wrong assert fails with deeply nested duplicate resources #35

Bug fixes

• relationships might have links and meta without data shown #32 and #33
• input data might be an associative array but not only index based #34

[v0.5.0] Enhancements and bug fixes

• Added URL prefixing
• Added default value for Request Content-Type header
• Added support for JSON API version
• Big improvements for meta support
• Updated errors, relationships, headers handling

[v0.4.2] Fixes and updates

Merge upstream

Field set filters fixed

Merge pull request #20 from neomerx/develop

Closes #19

[v0.4] JSON API v1.0 (RC4) specification implementation

v0.4.0

RC4

[v0.3] Improve resource inclusion, encoding, error handling and performance

• Streamline show URLs logic. Having related controller data and self controller data requirement in schema are obsolete.
• Streamline include resource logic. INCLUDE key and defaultParseDepth are obsolete. Include paths could be set in schema and encoder can override them with EncodingParametersInterface.
• Add support for meta in linkage objects
• Add support for rendering JSON API Errors in exception handler