Merge pull request #19 from slayoo/master

adding Python interface to common::const_cp::p_vs
Merge pull request #21 from slayoo/master

sync...
Merge pull request #22 from slayoo/master

sync...
Merge pull request #23 from slayoo/master

removing blk_1m_pytest from CMakeLists.txt
wip on chem stuff
chemistry: working diag_chem + python bindings + example in parcel/test.py
adding a comment on how to quickly disable CUDA
adding a draft of chem step logic
some more diagnostics in python/parcel test
removing print
python/parcel: diag() methods; 3-file gnuplot-compatible output; ...
chem: wip on absorption (still gives zeros...)
wip on chem (0th and 2nd steps)
adding forgotten dissociation constants
wip on chemistry - finishing equilibrium stuff
chem: merging all che[] into one vector to make it compatible with boost::odeint
all instances of using-namespace-thrust-placeholders converted to namespace-arg=... to workaroung boost-thrust conflict (see https://github.com/headmyshoulder/odeint-v2/issues/134)
wip on non-equil chem
Merge github.com:trontrytel/libcloudphxx
chem: fixing const_iterator issue