Allow concurrent bootstrap



See merge request !3

allow concurrent builds.

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

Use underscore instead of dot in extension zip file name.



See merge request !2

config.qfq.ini: REDIRECT_ALL_MAIL_TO = john@doe.com
All emails, sent bey QFQ will not be sent to the given receiver, instead they are delivered to 'catch all email' address.
Sendmail.php: Check config.qfq.ini setting for REDIRECT_ALL_MAIL_TO - if set take that address as real receiver for all mails from Form and Report.

DatabaseUpdateData.php, QuickFormQuery.php, formEditor.sql, TestFormEditor.sql: set new escapeDefaultSetting in Schema.

Fixed: unnecessary exception if there is no Form / FormElement table
Database.php: New function playSqlFile().
DatabaseUpdate.php: missing table Form won't throw an exception anymore.
Manual.rst: note that formEditor.sql will be played automatically.

Also respect version numbers which are not configured in DatabaseUpdateData.php and between two configured version numbers.

For updates of QFQ prior to 0.17.0, do:   ALTER TABLE  `Form` COMMENT =  'Version=<your old QFQ version>'
DatabaseUpdate.php, DatabaseUpdateData.php: new class.
QuickFormQuery.php: Add DB UpdateCheck
Database.php: moved to new subdirectory `database`. Add 'ALTER' as a new SQL command.
FormAction.php, TypeAhead.php, Report.php, Sendmail.php, FillStoreForm.php, Store.php, AbstractBuild.php, Delete.php, Evaluate.php: Update path to Database.php.

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

README.md: temporary path to documentation

.*rst: Migration back from qfq-doc to qfq

Run sphinx before rolling ZIP files.

README.md: add link to official doc.

Manual.rst: Add 'General'. Explain in more detail why `[FE][lockIP] = 0` is necessary. Add ESCAPE_TYPE_DEFAULT to config.qfq.ini explanation. Rewrite explanation for typeAheadLdapSearchPerToken.