Changes from version 1.1.1 to 1.1.3
 * Fixed an error related to function definitions.
 * Fixed compatibility with igraph package version 1.0.1.

Changes from version 1.1.0 to 1.1.1
 * Fixed an issue that caused the results of some conditional causal effects to be erroneus.

Changes from version 1.0.0 to 1.1.0
 * Added functionality to identify conditional causal effects.