Modifications for module installer in openemr.
Zend framework 2 based module installer that can be used to install and integrate custom modules developed as separate modules into the openEMR. The application module is the core module which contains the database handling functions and other common functions. Please find the documentation for the same in the following links:

WhyModulesInstaller.pdf - http://sourceforge.net/p/openemr/code-review/232/attachment/WhyModulesInstaller.pdf
ModuleInstaller-DeveloperGuide.pdf - http://sourceforge.net/p/openemr/code-review/232/attachment/ModuleInstaller-DeveloperGuide.pdf

Please refer line no.26 in zend_modules/init_autoloader.php for setting up ZF2 Library Path Settings.

Signed-off-by: Ajil P M <ajilpm@zhservices.com>
ZEND project: removed the DeleteAcl() function in interface/modules/zend_modules/module/Installer/src/Installer/Model/InstModuleTable.php
ZEND project: set writable permissions to zend module config file at interface/modules/zend_modules/config/application.config.php
Added the zend framework 2 library, the path is specified in line no.26 in zend_modules/init_autoloader.php.

For using custom ZF2 library change the path in the specified file.

Signed-off-by: Ajil P M <ajilpm@zhservices.com>