[CMake] improved support for boost and gcc

[Markus Grabner]

	Hi!

    The attached patch fixes two issues in FindBoost.cmake:

*) Adds support for Boost version 1.37

*) Some versions of gcc report their version number as "major.minor" instead 
of "major.minor.patch" and are therefore not recognized by FindBoost. By 
making the ".patch" optional, cmake correctly identifies the compiler and 
therefore the Boost libraries.

Can this be applied to the repository?

	Kind regards,
		Markus


-- 
Markus Grabner - Computer Graphics and Vision
Graz University of Technology, Inffeldgasse 16a/II, 8010 Graz, Austria
Phone: +43/316/873-5041, Fax: +43/316/873-5050
WWW: http://www.icg.tugraz.at/Members/grabner
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