edited lines in CMakeLists.txt file to allow for c++11 compatibility with XCode
also changed minimum OSX version to 10.8
Doxygen only.
Converted doxygen-style comments to ordinary comments and removed duplication from Component.h.
Merge pull request #103 from opensim-org/correctDoxygenForComponent

Doxygen only.
Merge pull request #92 from opensim-org/apoorvarCMakeListsXcodeEdit

edited CMakeLists.txt file to allow for c++11 compatibility with Xcode
Spelling in CoordinateLimitForce docs.
Merge pull request #116 from moorepants/spelling

Spelling in CoordinateLimitForce docs.