* Fixed substitutions to be evaluated after all files are loaded. PR[36]
0.3.4
* Fixed substitutions that are overridden later on by a non substitution. PR[34] * Added logging. PR[30] and PR[31]
0.3.3
* Fixed optional substitution when overriding elements at the same level. PR[28] * Silent IOErrors when including nonexistent files. PR[24] * Fixed when assign key to a value, list or dict that starts with eol. PR[22]
0.3.2
* implemented optional substitution (e.g., ${?abc}) and fixed substitution logic when having dict merge. PR[20]