updating changelog and bumping version

fixing required # of params for add server(s) function for client

GearmanClient::addServer and GearmanClient::addServer(s) along with their
functional equivalents had an incorrect # set for required params, which led to
issues when reflected classes were using these values

Param to skip exception handling setup in addServer/addServers in Gea…

…rmanClient class

Addressing issue #59 in wcgallego/pecl-gearman
(#59)

In 2013, a patch was introduced in the core libgearman code to do checks for
connections to the GearmanD daemon. In doing so, the libgearman function
gearman_client_set_server_option now does a connection to the GearmanD daemon,
breaking the contract that GearmanClient::addServer and addServers does not do
any connection work, but simply adds the host names to an array.

If the host cannot be reached, this will throw an exception.

This patch makes it optional to skip the exception handling code here and to
attempt making the connections as needed when actual work needs to be done.

Bumping to version 2.0.4

bumping gearman pecl version, updating release notes

Adding tests for all classes, migrating classes to separate files

pecl/gearman-2.0.1. This should be the first tagged release for PHP 7…

… and is not backwards compatible with lower versions

Release of pecl/gearman-1.1.0

gearman-1.0.3 release

gearman-0.8.3 release

gearman-0.8.2 release