added readme

Readme.md

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+# Tesla2Csv
+
+This converter-script is an addition to a maven profiler called "tesla-profiler".
+A version of the profiler can be found for example here: 
+* https://github.com/takari/maven-profiler
+* https://mvnrepository.com/artifact/io.tesla.profile/tesla-profiler
+* ...
+
+To install the profiler, simply place the jar file inside `$MVN_HOME/lib/ext`
+
+Then you can run the profiler and save the output to a file:
+`mvn clean install -Dmaven.profile > profile.log 2>&1`
+
+From the created output, extract the profiling section.
+See `profile.log` for an example.
+
+In order to convert the output to CSV, simply run the Perl script: `./convert.pl`
+
+At the moment there are no arguments, if you want to change the in- or output file, you have to edit the script.