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* Update HISTORY.rst by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/179
* Remove filter direction attributes by kkappler in https://github.com/kujaku11/mt_metadata/pull/181
* Fix issue 173 by kkappler in https://github.com/kujaku11/mt_metadata/pull/182
* Patch 173 by kkappler in https://github.com/kujaku11/mt_metadata/pull/183
* Add some common helper functions by kkappler in https://github.com/kujaku11/mt_metadata/pull/185
* Bug fix in FC layer by kkappler in https://github.com/kujaku11/mt_metadata/pull/186
* Fix mth5 issue 187 by kkappler in https://github.com/kujaku11/mt_metadata/pull/187
* bug fixes by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/180
* updating how a TF is initiated, initialize xarray is expensive by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/188
* Change default value of `get_elevation` to False by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/191
* Updating git clone address in the readme by xandrd in https://github.com/kujaku11/mt_metadata/pull/189
* Fix how Z-files read/write by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/192
* Adjust how TF._initialize_transfer_function is setup by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/193
* Add Ability to store processing configuration in TF by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/196
* Bump version: 0.3.3 → 0.3.4 by kujaku11 in https://github.com/kujaku11/mt_metadata/pull/198