CHANGELOG.md file updated with commits between the current and previous tag.

* 1b3b106 -- Update pom.xml version.

*   b79d924 -- Merge branch '51-refactor-visitors' into 'master'

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| * 81e0b5b -- FInal refactoring

| * 1423a38 -- Fixed error in corner table hashing

| * 49b2b40 -- Corner table extended with vertex-to-row hash map

| * 8667d56 -- Minor changes

| * 5ad6b81 -- Curvature distance moved to MeshFacet

| * 32d15cf -- Computation of the closest point on triangle moved from visitor to MeshTriangle

| * 31fed48 -- Minor updates

| * b202664 -- Final refactoring and documentation

| * d5967b4 -- New efficient implementation of point-to-tri distance and related refactoring

| * a6590c2 -- Finished concurrent implementation of visitorts and their tests

| * c5cfbdc -- Efficient concurrent thread-safe implementation of HausdorffDistMeshVisitor

| * 33d3d85 -- Added constructor for MeshModel

| * e0d8f31 -- Visitors refactored to by used concurrently

| * bc519b3 -- Added visitrConcurrent() method to the MeshModel

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* f6f913d -- CHANGELOG.md file updated with commits between the current and previous tag.

* 1066d04 -- Update pom.xml version.

*   eaa061b -- Merge branch '49-refactoring-humanface' into 'master'

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