closes #52

required libs are not yet grouped

* PluginLib

This reverts merge request !92

As the new glLoad is not compatible with Qt 5.6 we will continue using
glew for now.

This reverts commit 22938119, reversing
changes made to ed8a9a65.

Only type plugins and the core will access the update function

specification of additional libraries for each plugin to be linked into the core.

meminfo should be as accurate as around 100mb

ps: i am still missing around 700 mb mrmory from the provided information, but this is better than before

* hopefully everything should be ready to be merged now