Fix #1486 for v1.3.0
Enable memcached.so

(cherry picked from commit 7ae941db3f7bd0c7d432b939c3de7cccb6bed757)

Conflicts:
	.travis.yml
Merge pull request #1492 from dreamsxin/bug_1486_1.3.0

Fix #1486 for v1.3.0
Fix #1494
Fix Log Formatter getTypeString EMERGENCY bug

This fixes a bug that prevents the EMERGENCY log type being displayed correctly.
(cherry picked from commit 7cb8f4bb52a069a3146f7c69789dca384f499206)
Test case
Merge pull request #1493 from sjinks/memcached

Enable memcached extension
Merge pull request #1496 from sjinks/issue-1494

Fix #1494
Merge pull request #1498 from sjinks/logger

[1.3.0] Fix Log Formatter getTypeString EMERGENCY bug
Test case for #1501
Fix #1501
Merge pull request #1503 from sjinks/issue-1501

Fix #1501
Test case for #1504
Fix #1504
Implement #1495
Test case for #1509
Fix #1509
Merge pull request #1507 from sjinks/issue-1504

Fix #1504
Merge pull request #1508 from sjinks/issue-1495

Getter for Phalcon\Logger\Adapter\File::_path
Merge pull request #1510 from sjinks/issue-1509

Fix assertion failure on unclean shutdown