Added helpers to collectContentPre and collectContentPost

[cristo-rabani]

Function makeContentCollector is used on both sides (client/server)
but sometimes we need read somethings from html attribute.
and passing data by class is very not elegant way.

[JohnMcLear]

Please read contributing.md for style guide, your indentation looks incorrect here..?

[cristo-rabani]

Sorry, I copied and pasted it from my local version.
I used github editor for this for now.
It will be helpful if you prepare editorconfig file ( http://editorconfig.org/ )

In my bitbucket repository I have many core changes,
mostly for optimization like caching in indexedDB for long texts.
Don't serializing data to json for mongo and storing in a few collections instead just in one (This is new database type for ueberDB [I really don't know why someone wants to serializing data to json before save it to mongodb. This slows down loading about ~20%])

Sometimes I change formatting of some files because I hate if '{' is in new line.
This breaks folding of code in webstorm and makes code is too lengthy and is harder to reading for many people but this can be an 'de gustibus'.

When I will be have free moment, I am going to fix formatting.

[JohnMcLear]

Bump @cristo-rabani

[cristo-rabani]

check now

[JohnMcLear]

Spacing still wrong here..

[JohnMcLear]

@cristo-rabani sorry dude there are merge conflicts :! My bad, that file is active!

Can you please resolve the merge conflict please?

One thing I would like is an example snippit of the helpers being used in a plugin so others can reference this.. I'd also like to see some docs be included, contentCollectorPre is exposed to plugins so the additional functionality needs docs to land in http://etherpad.org/doc/v1.5.0/#index_collectcontentpre

Once we have:

• a reference snippit (for usage)
• Docs into http://etherpad.org/doc/v1.5.0/#index_collectcontentpre
• Merge conflicts resolved

Then this is good to merge

Thanks!

[JohnMcLear]

Another bump @cristo-rabani if you want to see this land...

[JohnMcLear]

Closing as stale.