Removed superfluous include of stdint.h

Besides, it doesn't work on VS 2008.
Completed data for the Olympus M.Zuiko Digital ED 75-300mm f/4.8-6.7 II.

Vignetting was updated, and distortion and TCA added.
Improved lens model name of one Pentax lens.
Added missing <aspect-ratio> tag to Olympus 25mm lens.
Added two lenses and updated a third.

Added smc Pentax-DA 50mm f/1.8 and Leica DG Summilux 15mm f/1.7.  Added TCA
data and improved distortion data for the Olympus M.Zuiko Digital 25mm f/1.8.
Added Olympus E-PL7.
Renamed internal functions for switching projection.

This is the last remains of the old misassumption that Lensfun's coordinates
modifier functions correct.  In fact, they distort, and then these distorted
coordinates are used by the caller for the pixel lookup in the (distorted!)
original picture.  Accordingly, e.g. ModifyCoord_Geom_Rect_FishEye took fisheye
coordinates as input and returned rectangular coordinates.  Consequently, it is
now called ModifyCoord_Geom_FishEye_Rect.
Fixed coordinate test.  It fails now.

Added AspectRatio to lens.  Moved lfModifier->Create just before every
lfModifier->Initialize so that the callbacks cannot pile up.  By the way, this
demonstrates nicely that Lensfun's current API is complicates and error prone.
Improved Glib2 DLL lookup on windows. DLL is only installed when it was found.
Add verbose output to modifier test to see where it crashes in the geometry conversion
Check for zero radius in panoramic->fisheye conversion. All checks pass.
Added Samyang 14mm f/2.8 ED AS IF UMC for APS-C.
Added Canon PowerShot S95.
Removed pasing of the lens name in case of tele/wide angle converters.

Reason is that in case of converters, the focal length in the lens name is
wrong and may thwart lens lookup by name.
Amended one Sigma lens model name.
Added Nikkor AF 28-80mm f/3.3-5.6G.
Added Nikkor AF 28-200mm f/3.5-5.6G IF-ED.