Update README.md

README.md

 # ARQMath-eval
+
+### Install:
+
+```sh
+pip install git+https://gitlab.fi.muni.cz/xstefan3/arqmath-eval@master
+```
+
+### Description
+
 This repository evaluates the performance of your information retrieval system
 on a number of *tasks*:
 
@@ -7,6 +16,8 @@ on a number of *tasks*:
 - `ntcir-12-mathir-arxiv-main/` – [NTCIR-12 MathIR Task ArXiv Main Subtask][ntcir-12-mathir].
 - `ntcir-12-mathir-math-wiki-formula/` – [NTCIR-12 MathIR Task MathWikiFormula Subtask][ntcir-12-mathir].
 
+### Usage
+
 Place your results in [the trec\_eval format][treceval-format] into your
 dedicated directory *task/user*. To evaluate and publish your results,
 execute the following commands: