Ticket #79
	- documentation for addRecoveryAccessor() and getRecoverySharedMutex()

  - Cleaned up comments
  - Place using-declaration of buffer_2D to class definition so the base
    class name can be omitted in the implementation

forgot to commit latest change: testProcessVariableRecovery now tries to get exception by reading (not writing), currently failing

  - add list with shared ptr of transferElements for recovery write
  - add shared mutex

  - Cleanup:

    - Reorder code in Application::createDeviceVariable
    - Separated ExceptionHandlingDecorator constructors for writable and
      non-writable registers
    - cleaned up doPreWrite

  - First compiling version, tests pass, hope it works...
  - Needs some tweaking

- ConfigReader is in ApplicationCore.h, but was including ApplicationCore.h itself
- Added include guards to ApplicationCore.h, although it's not stricktly needed (all included headers have one). Might speed up complilation because it makes it easier for the parser.

Device support for history

device_support_for_history

add two more ignores related to eclipse projects.

This is needed to add all device variables to e.g. the history module.

Connecting a device only works if the PVs are readonly! So one has to
use the logical name mapping backend. This also allows to select only a
subset of the device PV to be added to the history module.

If the hdf5 library is not available, the MicroDAQ module is automatically not build. You don't have to specify -DBUILD_MICRODAQ=OFF to make cmake run through.