Transformations and analysis refactoring

examples/kernels

examples/kernels.pdf

examples/lj_func.py

examples/lj_ns.cpp

setup.py

src/pairs/analysis/__init__.py

src/pairs/analysis/bin_ops.py

src/pairs/analysis/blocks.py

src/pairs/analysis/modules.py

src/pairs/sim/simulation.py

src/pairs/transformations/__init__.py

src/pairs/transformations/blocks.py

src/pairs/transformations/devices.py

src/pairs/transformations/expressions.py

src/pairs/transformations/loops.py

src/pairs/transformations/lower.py

src/pairs/transformations/modules.py

src/pairs/transformations/replace_symbols.py

src/pairs/transformations/simplify.py