via WS->getDetector()

Note to testers: Use the ResizeRectangularDetector algorithm to change the X/Y
size of a bank.
Try ray-tracing to it (e.g. peak finding or RayTracerTester).
It should look scaled in the instrument view.

The valgrind tool helgrind flagged up some race conditions in the code.
This is not a complete list of those that need fixing but some major ones
that would affect large portions of the code

Fix potential crash if number of OpenMP threads is increased above default via MultiThreaded.MaxCores in properties file. No performance impact seen on the 'usual' case (threads=number of processors). Re #3834.

Continue obsession with const: ExperimentInfo(MatrixWorkspace)::getInstrument now returns a const instrument. Re #1944.

Add pointer to physical instrument as a member (not used in vast majority of cases) of Instrument. Show this 'physical instrument' in the instrument view, if it exists. Re #1944.
P.S. This again lead to a const change which accounts for most of the changes.

Eradicate IInstrument. Instrument's the one to talk to now (it was the only descendent class anyway). Re #2041.

Refs #3003: Added ParComponentFactory basic test. Added a few tests in the hope of tracking down my parallel bug; no luck.

Implemented parametrized detector pooling to speed up loops around MatrixWorkspace::getDetector. The example loop in the ticket for a dataset with ~300000 histograms now takes ~0.3 seconds on an 8-core machine versus 1.5 previously. Re #2528

pooling isn't cooperating as well on the build servers as on my machine where everything ran fine./MantidPlot/ Re #2276

Created a pool for parametrized detector objects to avoid excessive calls to the new operator in multi-threaded loops. If a cached object already exists and is unique then it's memory is reused rather than reallocating another object. This alleviates some of the locking within threaded loops that was impeding the scaling with the number of cores. There is still something to done with instruments but an issue remains with plottable components. Re #2276

Rename Framework code directory to just that. Also delete Main and VS & Eclipse project file. Re #1881.

Revert parametrized components to store a simple pointer to the parameter map to avoid excessive copying when the workspace copy mutates in an algorithm such as LoadDetectorInfo. Alog with this the excitations conversion script has been fixed so that it works with ISIS instruments. Also cleared a few warnings about no newlines. Re #1934 

Refs #1884: Merging branch into trunk. Several classes in Geometry were removed in order to simplify parametrized components. ParDetector, ParObjComponent, etc. are now handled in the same class.

Refs #1749 and #1722: Added IRectangularDetector and ParRectangularDetector in order to handle parametrized locations. I seem to be having trouble getting the values from the DAS logs, but the plotting works though.

Caching implmentted improves getpos speed by slightly over 50%