Increases the minimum PHP version required to install CiviCRM 4.7.29 to be 5.4 as per the [announcement blog post](https://civicrm.org/blog/totten/end-of-zombies-php-53-and-54)
## <a name="bugs"></a>Bugs resolved
### Core CiviCRM
-**[CRM-21445](https://issues.civicrm.org/jira/browse/CRM-20941) Ensure Pay Later Processor is set so a fatal isn't thrown
Fixes an issue where string '0' wasn't being treated as false. So the checking of whether there is an empty value is now done in the on change listener for the full text search switcher
- **[CRM-21562](https://issues.civicrm.org/jira/browse/CRM-21562) Fix line item mis-saving when using a ',' as the thousand separator
Fixes an issue where the check to see if the MySQL server was a MariaDB instance wasn't working right. This lead to hard crashes as queries were being incorrectly re-written
## <a name="credits"></a>Credits
This release was developed by the following code authors:
AGH Strategies - Alice Frumin, Andrew Hunt; Agileware - Alok Patel, Justin
Freeman; Australian Greens - Seamus Lee; Christian Wach; Circle Interactive -
Dave Jenkins; CiviCoop - Klaas Eikelboom; CiviCRM - Coleman Watts, Tim Otten;
CiviDesk - Nicolas Ganivet, Yashodha Chaku; CiviFirst - John Kirk; Community IT
Academy - William Mortada; CompuCorp - Michael Devery, Mukesh Ram, Omar Abu
