[EAK-480] More informative exception messages

[smiakchilo]

As an EAK user, I would like to receive detailed information in case of an internal markup rendering exception (while running the plugin):

• it happened while rendering what component of my project?
• if it happened when rendering a reusable piece of code (a fieldset), what was the hosting component?
• what field/methods caused the exception?

Additionally, I need a finite and concise nomenclature of the exception to be able to set up a plugin termination policy via terminateOn setting.
Description of these exceptions should be added to the ToolKit's docs