runtime/dds: fix reset glitches
transforms/interleave: handle 'at'
transforms: quantize time before interleaving
transforms: assume isinstance(expr, ast.Call) => isinstance(expr.func, ast.Name) after inline
manual/installing: add python-dev as dependency

According to Joe:
building llvmpy requires Python.h for python2.7. If python-dev is not installed here's the error.
llvmpy/api.cpp:2:20: fatal error: Python.h: No such file or directory
manual/installing: add JTAG udev instructions (thanks Joe)
manual/installing: fix some paths and compile llvm with -j4 (thanks Joe)
manual/installing: cleanup xubuntu package list (thanks Robert)
manual/installing: various small notes
manual/installing: plugdev -> dialout
add requirements.txt