Add versionadded to the new json_pack() format specifiers
Support \u0000 - add size_t string lengths to API, load and dump \u000, etc.
Also:
  Steal strings during parsing for half the mallocs!
  Change all input-caused assertions to errors.  No crashes please, we're programmers.
dump \u sequences as upper case for readability (just like error messages)
expect "export" in test configs
document new null-friendly functions
Merge pull request #140 from chipdude/nuls

Support "\u0000" in strings
add new public functions to jansson.def
Merge pull request #141 from chipdude/nuls

add new public functions to jansson.def
Document s% and s# for json_pack, s% for json_unpack
Add Chip's changes to release notes
load.c: Change an error message
Fix NUL byte check for object keys
Clarify json_string_length doc
Add JSON_ALLOW_NUL decoding flag for enabling NUL byte support
Document JSON_ALLOW_NUL and clarify NUL byte handling
fix type mismatch anywhere int != int32 (Vorne)
Merge pull request #142 from chipdude/master

fix type mismatch anywhere int != int32 (Vorne)
paper bag bug: json_string_set* functions should set the length too
in simple string tests, always check lengths too
Merge pull request #143 from chipdude/master

paper bag bug: json_string_set* functions should set the length too