Merge pull request #1497 from sjinks/1.2.5

[1.2.5] Implement #987
Fix #1506 in v1.2.5
[NFR]When not found option renturn null
[NFR]When not found option renturn null
Updated README.md (#1525)
Merge pull request #1530 from dreamsxin/model_validator

[NFR]When not found option renturn null
Merge pull request #1538 from sjinks/1.2.5

Updated README.md (#1525)
Fix BUG #1536
Merge pull request #1545 from dreamsxin/1536_for_1.2.5

Fix BUG #1536 for 1.2.5
Casting total_items to int in QueryBuilder paginator
Fix doc in Phalcon\Mvc\ModuleDefinitionInterface
Extra newline
Merge pull request #1587 from endeveit/1.2.5

Fix doc in Phalcon\Mvc\ModuleDefinitionInterface
Merge pull request #1594 from dreamsxin/model_1506

Fix #1506 in v1.2.5 add Model\Row::toArray
Merge remote-tracking branch 'upstream/1.2.5' into QA-valgrind-1.2.5