As this is called from \MetaModel::Startup, our log will be available everywhere !
\DeprecatedCallsLog::Enable call in bootstrap was causing some tests to fail
Modification from what was done in #193
* New DeprecatedCallsLog logger enabled directly in bootstrap so that we can use it in the most situations
* Default Log level is now DEBUG for dev env, ERROR for others
* Logs the caller and the deprecated method called, like :
`2021-04-06 10:52:25 | Warning | AjaxPage::output L2857 calling WebPage:outputCollapsibleSectionInit | deprecated-method`
* Sample file consumer
* Sample php consumer
As older PHP version can cause multiple problems, and we still use lots of requires that can generate PARSE_ERROR on such version, we chose to add this very low-level control. Therefore user will get a clear error message, and oldest PHP version will be blocked in the whole application.
- bootstrap.inc.php is now included by approot.inc.php
- remove all unescessaries includes of bootstrap.inc.php
- in bootstrap.inc.php autoload can be bypassed using a feature flag because "why not"
