Add README.md

README.md

+### Biotools Populous is a utility to push biotools data into a git repository.
+
+The utility is based on modified version of [JGit](https://github.com/redmitry/jgit) libarary based on [NIO2](https://jcp.org/en/jsr/detail?id=203) API and 
+Jimfs(https://github.com/google/jimfs) in-memory file system. It allows wirking with git repositories directly, without writing anything on a disk.
+
+To get tools data, utility uses the Biotools REST API (https://bio.tools/api/tool/).
+Generated files are in JSON format inferred from [biotoolsSchema 3.1](https://github.com/bio-tools/biotoolsSchema).
+
+Compiling:
+```shell
+>git clone https://gitlab.bsc.es/inb/elixir/tools-platform/biotools-git-populous.git
+>cd biotools-git-populous
+>mvn install
+```
+
+It will create **biotools-populous.jar** file in the **biotools-git-populous/target/** directory.
+
+Compiling:
+```shell
+>java -jar biotools-populous.jar -g https://gitlab.bsc.es/xyz -u user -p password --path /biotools
+```
+
+where:
+
+* -h         - help
+* --git      - git repository to push tools json files
+* --branch   - remote branch to push
+* --path     - remote path to put files
+* --user     - git user name
+* --password - git user password