* Added serialization.txt to doc
* Fixed rendering problem in api.txt
* Use explicit tag when ref type renders to a scalar that can be
parsed to !!null
* Added test cases for this ref type fix
* renamed serialize to serializeObject and construct to constructObject
* added new serialize() and construct() procs that handle document
start & end
* re-raise AssertionError instead of swallowing it
* fastparse now used for everything
* private/[lexer|parser].nim gone
* Made fastparse use YamlParser object
* Got all tests working with fastparse
* Some more smaller changes to API
* Yield tag of custom type serialization when using ytsRootOnly,
but don't yield tags of map keys or values
* Yield proper tag of Table[K, V] serialization if requested
* renamed dumper.nim to presenter.nim to conform to YAML spec
* Fixed a bug in the lexer where an error would be raised if
characters not allowed in tag shorthands are used in local tags
* Fixed processing of object tags for all kinds of root nodes in Parser
* Improved dumper to output a space after a local tag
* Renamed some enumeration types to conform better to the YAML spec
* Added secondaryPrefix to YamlTagLibrary
* Added possibility to control tag output style independently from
presentation style in serializer
* Created local tags for all types that are serialized and use them in
construction and serialization
* Better JSON serialization (map bool literals to true/false if
possible)
* Fixed a problem where the tag of block sequence would be
wrongly placed
* Always output "" when dumping empty strings
* Added helper functions to create YamlStreamEvents.
* Moved procs for YamlStreamEvents to private/events.nim
* renamed dump() to present()
* Added dump() and load() to yaml.serialization
Felix Krause