scripts: strip_bom.py

* Introduces new scripts that strips away the BOM UTF8
  character from input files.

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Merge pull request #108 from kaplun/strip-bom

scripts: strip_bom.py
scripts: fix syntax error in strip_bom.py

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Merge pull request #110 from kaplun/fix-syntax

scripts: fix syntax error in strip_bom.py
scripts: unicode error fix

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Co-authored-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>