Improve cinterface

[lukaspj]

CInterface improvements

• Expand EngineAPI type definitions (replaces WIP: Added some missing field info to the EngineApi interface #2241)
• Fix name-clashing in script-exposed classes (these have not been an issue in TorqueScript because it doesn't fail, it just picks the first definition it finds).
• Update the EngineAPI, a little bit of simplification over the changes made in New cinterface #2248
• Improve the integration of the CInterface into existing systems
• Expose SimPersistID to the EngineAPI
• Improve EngineAPI export, less guess-work and compiler-dependency

Breaking changes

Name-clash fixes means that some members have been renamed, possibly breaking any scripts using these members.
AFX Members:

• Method afxPhraseEffectData::addEffect -> pushEffect
• Method afxMagicSpellData::addCastingEffect -> pushCastingEffect
• Method afxMagicSpellData::addLaunchEffect -> pushLaunchEffect
• Method afxMagicSpellData::addDeliveryEffect -> pushDeliveryEffect
• Method afxMagicSpellData::addImpactEffect -> pushImpactEffect
• Method afxEffectronData::addEffect -> pushEffect
• Method afxEffectGroupData::addEffect -> pushEffect

Other Members:

• Field GuiSpeedometerHud::mColor -> mNeedleColor (Maybe we could just use the parent class' mColor here instead?)
• Callback TriggerComponent::onEnterViewCmd ->onEnterView
• Callback TriggerComponent::onExitViewCmd ->onExitView
• Callback TriggerComponent::onUpdateInViewCmd ->onUpdateInView
• Callback TriggerComponent::onUpdateOutOfViewCmd ->onUpdateOutOfView
• Field PostEffect::isEnabled -> enabled
• Method GuiFilterCtrl::identity -> resetFiltering
• Field SFXDescription::reverbModTime -> reverbModDepth (dunno if it pointed to time or depth before, now there is one for each)
• Field GuiScriptNotifyCtrl::onChildAdded -> notifyOnChildAdded
• Field GuiScriptNotifyCtrl::onChildRemoved -> notifyOnChildRemoved
• Field GuiScriptNotifyCtrl::onChildResized -> notifyOnChildResized
• Field GuiScriptNotifyCtrl::onParentResized -> notifyOnParentResized
• Field GuiScriptNotifyCtrl::onResize -> notifyOnResize
• Field GuiScriptNotifyCtrl::onLoseFirstResponder -> notifyOnLoseFirstResponder
• Field GuiScriptNotifyCtrl::onGainFirstResponder -> notifyOnGainFirstResponder

Other (possibly breaking) changes

I also changed the default value of UndoManager::pushCompound from """" to "". Would like a review of whether this is valid or a misunderstanding on my part.

[lukaspj]

Since this is hard-to-test without actually using the C-Interface for something, this project might be useful:

https://github.com/lukaspj/T3D.Net-BaseGame

It has a pre-compiled version of this branch included already, and is set up with a SpectatorGameplay module written (mostly) in C#.

Edit:

Also Travis CI failed on clang on the last commit, but I do not believe this to be related to code, rather it seems to be an odd hiccup.