version 0.4.0 of CleanThesis style

• Fixed compatibility to new version of KOMA script
• Fixed code for headline/title styles (e.g., removed use of package titlesec)
• Fixed code for footer style (e.g., removed use of package fancyhdr)
• Fixed compatibility to new version of biblatex (e.g., obsolete options)
• Fixed an issue with page breaks at headings (thanks @guillerodriguez)
• Added style for part sections (often used for books)
• Added new package options: quotation style, bibliography sorting,
• Changed alignment of titles from justified to left aligned
• Changed the documentation according the updates
• Changed file structure of the repository in order to improve the development and release process
• Example: several improvements, such as location of appendix, use of subsubsections and paragraphs, long section titles, listings, pdf bookmark for toc, or separate config file