Refactored ascii_type in MosImporter to use elif.
Refactored parse_data of CSVImporter to use elif.
Some whitespace formatting.

Added empty lines at the end of the files, trimmed tralling whitespace in some files.
Typo and some linting in test_importer.py.
Merge pull request #30 from ajasja/importer
Merge branch 'master' of https://github.com/ajasja/spectraplotpy into plotting

Conflicts:
	spectraplotpy/spectrum.py
Renamed fig to axes where appropriate in Spectrum().

This fixes SpectralGroup/spectraplotpy#35.