Implemented: file upload check for mime type and max file size.
File.php, AbstractBuildForm.php: Implement FE_FILE_MIME_TYPE_ACCEPT and FE_FILE_MAX_FILE_SIZE

Makefile: qfq-doc
setVersion.sh: rename Setting.yml to Setting.cfg

README.md: add link to official doc.

setVersion.sh: new script which updates all version numbers in different documents.

* Recode the '_link' notation for download
* Add 'ZIP' as export format
* Add 'parameter' to wkhtmltopdf
* Implemented 'SYSTEM_STORE / SYSTEM_DOWNLOAD_POPUP' for detecting if there are download links on the page. This eleminates passing parameters through dozens of functions.
* Report/Columntype '_dDownload' broken!
Coding.md: described `download` from a coding point of view.
Manual.rst: Update '_link' to latest notation of 'download'.
download.php: implemented catching of 'Undefined index'. Added further exceptions.
Download.php: Added cache=off for downloading. Rename getFile() to getElement(). Make getElement() more generic. Add zipFiles(). Implement 'downloadMode' in doElements().
Html2Pdf.php: recode to new download notation. Parameter to wkhtmltopdf implemented.
Link.php: New TOKEN_* and NAME_DOWNLOAD_*, NAME_FILE. Move TOKEN_* to Constants.php. Will be used in Download.php too. Implemented 'SYSTEM_STORE / SYSTEM_DOWNLOAD_POPUP'. Implemented BASE64 encoding of multiple 'U' and 'u'.
Report.php: Implemented 'SYSTEM_STORE / SYSTEM_DOWNLOAD_POPUP'.
Sip.php: implement debugSip() to show Sip. New: base64 encoded parameter will be shown in clear.
Store.php: some functions missed keyword 'static'. getVar() and getStore automatically decode base64 parameter.
QuickFormQuery.php: Implemented 'SYSTEM_STORE / SYSTEM_DOWNLOAD_POPUP'.

Manual.rst: Added 'howto remove <p> in TinyMCE'

HTML.md: update latest attribute names
Release.rst: copied git log

#3180=#2081 dynamicUpdate, rearrange 'input hidden' elements from checkboxes, radios to top of form.

CODING.md: add some doc about STORE_ADDITIONAL_FORM_ELEMENTS.
load.php (#2081): rearrange delivered JSON to fullfill client API.
AbstractBuildForm.php: rename getJsonElementUpdate() to getFormElemenForJson(). Extend getFormElementForJson() to support changes for label and note. Fill store STORE_ADDITIONAL_FORM_ELEMENTS with 'hidden input' elments.
QuickFormQuery.php: implement Client JOSN API update.

PROTOCOL.md: added 'the attribute' in one sentence

#3253: STORE_TYPO3: steht waehrend Update / Save nicht zur Verfuegung - wird aber benoetigt. Bsp: feUser, beUser, pageId, ...

CODING.md: described implementation.
Store.php: fixed setting of STORE_SYSTEM / showDebugInfo during API call.

Coding.md: Beschreibung in Deutsch wie die Formularelemente , rekursiv, gerendert werden.
AbstractBuildForm.php: new function buildTemplateGroup()
BuildFormBootstrap.php, BuildFormPlain.php, BuildFormTable.php: Preparation for new optional TemplateGroup wrap.
QuickFormQuery.php: update comments.
formEditor.sql: column 'type' definition extended - new 'templateGroup' enum. FormElement 'type' updated to new container element 'templateGroup'

Support.php, AbstractBuildForm.php: new function falseemptyToZero().
Constants.php: New UPLOAD_MODE_*
Evaluate.php: fixed bug in 'skip' logic of evaluate->parseArray()
Save.php: doUpload() now returns $modeUpload, which are needed in doUploadSlave(), rewrote logic of doUploadSlave(),