* Replaced all assert statements with yAssert, which prints an error message
and quits on failure, but does nothing when compiling with -d:release.
* Implemented and used internalError for better discovery of internal bugs.
Fixes#8.
* Made RawYamlStream able to raise YamlStreamError, which might primarily be
useful for user-defined serialization
* Properly encapsulate RangeError coming from int/uint serialization on 64bit
machines in YamlStreamError.
* Some minor style improvements
* Added raises pragma to every proc in yaml.nim
* Properly encapsulate exceptions from YamlStreams
* Discovered a Nim compiler bug and added a workaround
* Added possibility to query line, column and line content from
YamlParser
* Updated rst documentation
* Actually call callback in fastparse if available
* Fixed parsing YAML version
* 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