* Add invoice address heading field
* Update invoice test cases
* Add default value to buyer address heading
* Add Street2 and State address fields
* Add configurable address separator field
* Improve invoice test cases
* Add support for multi-block styled paragraphs
* Fix context space when drawing division inside tables
* Update context height when drawing tables
* Update advanced invoice test case
* Add basic multi-block styled paragraph test case
* Parse form fields with embedded widget annotations
* Try matching fields both by partial and full names on form fill
* Use default font if widget font is not found when generating appearance
* Add JSON extract and fill test case
* Add reader method for retriving the PageLabels entry from the catalog
* Add writer method for setting the PageLabels entry in the catalog.
* Add creator method for adding page labels for the output file
* Add creator page labels test case
* Minor page labels test case correction
* Fixed issue #243. Added optimize integration tests.
* Minor style change.
* XObjImage getParamsDict updates Columns and Rows.
* Added doc file for the optimize/tests package.
* UpdateParams for CCITTFax Encoder accepts Width and Height also. Removed
GetParamsDict Columns and Rows parameters from model.Image and
model.XObjImage.
* Fix i386 issue for the jbig2 arithmetic encoder.
* Added 386 architecture to the .travis/cross_build.sh
* Take spaces into account when wrapping styled paragraph text
* Fix starting position of styled paragraphs
* Wrap text unconditionally when style paragraph height is requested
* Fix styled paragraph text wrapping edge case
* Fix text chunk wrapping edge case
* Adapt text chunk test
* Wrap text unconditionally when paragraph height is requested
* Add text wrapping test case for styled paragraph using character spacing
* Skip invalid pop operation on empty graphics state stacks
* Fix clipping input values to size for Type 0 Functions
* Do not pass invalid Q content stream operator to external handlers
* Add render package
* Add text state
* Add more text operators
* Remove unnecessary files
* Add text font
* Add custom text render method
* Improve text rendering method
* Rename text state methods
* Refactor and document context interface
* Refact text begin/end operators
* Fix graphics state transformations
* Keep original font when doing font substitution
* Take page cropbox into account
* Revert to substitution font if original font measurement is 0
* Add font substitution package
* Implement addition transform.Point methods
* Use transform.Point in the image context package
* Remove unneeded functionality from the render image package
* Fix golint notices in the image rendering package
* Fix go vet notices in the render package
* Fix golint notices in the top-level render package
* Improve render context package documentation
* Document context text state struct.
* Document context text font struct.
* Minor logging improvements
* Add license disclaimer to the render package files
* Avoid using package aliases where possible
* Change style of section comments
* Adapt render package import style to follow the developer guide
* Improve documentation for the internal matrix implementation
* Update render package dependency versions
* Apply crop box post render
* Account for offseted media boxes
* Improve metrics of rendered characters
* Fix text matrix translation
* Change priority of fonts used for measuring rendered characters
* Skip invalid m and l operators on image rendering
* Small fix for v operator
* Fix rendered characters spacing issues
* Refactor naming of internal render packages
