Proposition for criteria and first selection of content authoring too…

…ls. Supports #5

technology/authoring.md

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+---
+title: Authoring
+---
+
+>  [Contribute your ideas and follow the discussion about the choice of authoring environment](https://github.com/iilab/contentascode/issues/5)
+
+* TOC
+{:toc}
+
+## Criteria
+
+The authoring environment should be:
+
+ - **Open source**
+ - Running in the **browser**
+
+6 potential candidate software are considered with these additional criteria:
+
+ - **Markdown support**
+ - **Git support**
+ - **Inplace editing**
+ - **Actively maintained**
+ - **Extensible**, it should be easy to add functionalities. See [Analysis below](#analysis)
+
+---
+
+|                                                          | Markdown |  Git   | Inplace | Active |
+| -------------------------------------------------------- | -------- | ------ | ------- | ------ |
+| [Prose](https://prose.io)                                | Yes      | github | No      | No     |
+| [Gitbook](https://www.gitbook.com/editor)                | Yes      | git    | No      | Yes    |
+| [Dillinger](https://github.com/joemccann/dillinger)      | Yes      | github | No      |        |
+| [Aloha](http://www.alohaeditor.org/demo/aloha-ui/)       |          |        | Yes     |        |
+| [Pen Editor](http://sofish.github.io/pen/)               | Yes      | No     | Yes     | Yes    |
+| [ContentEditable](http://html5demos.com/contenteditable) | No       | No     | Yes     | Yes    |
+
+## Feature Gaps
+
+Based on the [design goals](../../approach#design-goals) the following features should be implemented:
+
+### Non negotiables
+
+ - **Media**: Prose for instance manages media if in a single folder. Should have some library features. 
+ - **Links**: Are too easy to break, or complicated to create. Should be checked client side.
+ - **Metadata**: Even if content is made of several blocks (including reused blocks), they should be invisible and be previewable as a whole, carry invisible metadata and allow various degrees of structure to be enforced.
+
+### Nice to haves / Possible Easy Wins
+
+ - **Iconography**: Having an icon library like glyphicons or font-awesome would be... not bad.
+ - **Forms**: After all that's what GFM ```- [ ]``` are.
+ - **Diagrams**: Mermaid is where it's at.
+ - **Offline**: Work offline or with an unhosted approach (remote storage git layer?)
+
+### Unicorns
+
+Let's say goodbye to google docs.
+
+ - **Realtime collaboration**: Substance where have you gone... OT over Git please.
+ - **Spreadsheet editing**: Quip style of course. There are a number of good looking spreadsheet.js approaches. 
+
+## Analysis
+
+|                 | Offline | Desktop | PDF | Dropbox | G Drive | Distraction free |
+| --------------- | ------- | ------- | --- | ------- | ------- | ---------------- |
+| Prose           |         |         |     |         | No      | Yes              |
+| Gitbook         |         | Yes     | Yes |         | Yes     |                  |
+| Dillinger       | Yes     |         | Yes | Yes     | Yes     | Yes              |
+| Aloha           |         |         |     |         |         |                  |
+| Pen Edit        |         |         |     |         | Yes     |                  |
+| ContentEditable |         |         |     |         | Yes     |                  |
+
+
+### Prose
+
+### Dillinger
+
+AngularJS - HTML enhanced for web apps!
+Ace Editor - awesome web-based text editor
+Marked - a super fast port of Markdown to JavaScript
+Twitter Bootstrap - great UI boilerplate for modern web apps
+node.js - evented I/O for the backend
+Express - fast node.js network app framework @tjholowaychuk
+Gulp - the streaming build system
+keymaster.js - awesome keyboard handler lib by @thomasfuchs
+jQuery - duh
+
+### Aloha
+
+### ...