[FEATURE] Initial commit of new plugin "feediting"
[CHANGE] Contentloading and editing works
[CHANGE] Group identified content in blocks
[CHANGE] Working "In-Markdown-Editing" functionality (Loading contents, building blocks, reinit jeditables, ...)
[CHANGE] "In-Page-Edited"-contents get stored to file (currently only Markdown supported))
[FEATURE] Merge branch "In-Page-Editing" into master