Ability to customize the format of a string representation of selected data.

Corrected JSON handler (the bug was introduced in the libtree v0.7.0).

Algorithm of the XML handler is brought into compliance with the algorithm
Corrected ALT Linux "checkinstall" testing scheme;
Modified tests;
Build with debuginfo enabled.

Improved API;
Ability to have optional nodes in branch drafts;
Ability to index selected values.

Fixed XML parsing;
Validation of XML documents is optional (disabled by default).

Corrected handling of exceptions (the code is heavily refactored, be aware!).

Ability to reserve tree items by passing empty branch drafts.

Handling attributes of '<...>:<attribute_name>' format;
Ability to avoid empty lines in string representation of selected data.

Corrected stringification.

Shorter representation of JSON bool values.

Corrected and modified JSON procedures;
Using headers and lib from buildroot to build checkinstall package,

Build with tests activated.

Initial release;
Tests are not yet activated.