Add essential project documents

.gitignore

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+*.aux
+*.log
+*.pdf
+*.pytest_cache
+__pycache__

LICENSE

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+MIT License
+
+Copyright (c) 2018, 2019 Septima
+Copyright (c) 2019-2022 SDFE
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

environment.yml

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+name: helmertchains
+channels:
+  - conda-forge
+dependencies:
+  - numpy
+  - pyproj
+  - pytest

readme.md

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+# Helmert Chains
+
+Proof of concept that demonstrates how to combine Helmert transformations
+for more effecient computations
+
+## Setup
+
+```
+conda env create --file environment.yml
+conda activate helmertchains
+```
+
+## Run tests
+
+In the root of the repository:
+
+```
+pytest test.py
+```
+
+## Generate PDF docs
+
+```
+pdflatex docs/main.tex
+```