Merge pull request #61 from trontrytel/master

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Merge pull request #62 from trontrytel/master

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Merge pull request #63 from trontrytel/master

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renaming README.md -> README
adding npa option to MPDATA (negpart/pospart using abs(); adding a draft of mpdata_1d_opt_eps
making test CMakeLists.txt compatible with out-of-source builds
Merge branch 'master' of github.com:slayoo/libmpdataxx
mpdata: fixing fct_2d
Merge branch 'master' of github.com:slayoo/libmpdataxx
fixing Clang flags - Clang 3.2 gives segfaults with -mllvm -vectorize!!!
adding temporary Courant stats output in bombel.hpp; adding new bcbf test