Add bash-completion file
Merge remote-tracking branch 'abel/bash-completion' into master-unix
Include bash completion in install

- Add `perprof.bash-completion` in `data_files`
- Check if can copy `perprof.bash-completion`
Merge branch 'master-unix' into bash-completion
Merge remote-tracking branch 'r-gaia-cs/install-bash-completion' into bash-completion
Correct bash-completion installation
Merge branch 'master-unix' into error
Add PT translation to TikZ backend

For the translation we use gettext.

Note: The *.mo files have been add to make easy the installation.
Update file name
Update translation
Merge pull request #57 from r-gaia-cs/i18n

Internationalization and localization
Add flag for translation of axis label

Related with PR #40.

Add flat `--lang` to select the language of the axis labels. The
language of the label can be different from the system language.

**Note**: No option to user defined label will be provided right
now.

**Note**: Probably this not work with Windows.
Merge pull request #56 from r-gaia-cs/lang

Add flag for translation of axis label
Update some default parameters