v2.0.0

Sorry for big update. Some components are probably unstable/broken - needs more testing

Core:

• Use vcpkg for dependency management
• General repository cleanup
• File parsing related code moved to simon987/libscan
• Replace libcurl with mongoose
• Replace libonion (http framework) with mongoose
• Add title, author and modified_by fields for ooxml files
• Fix bug with libmagic & files inside archives
• Support for .mobi, azw, azw3 files #41
• Unit testing in libscan

UI:

• Change image lightbox (with faster/simpler mobile support)
• Use modal for video viewing
• Use SVG icon instead of utf-8 glyph for info icon
• Rely on thumbnail field instead of assuming that certain file types have a thumbnail #42
• Option to sort by date/size/

Breaking:

• Serialization changes, needs re-index
• New elasticsearch mappings, needs --force-reset
• Elasticsearch https support probably doesn't work (See #45)
• --bind and --port combined into single --bind argument