change to numpy definition of size_t

np.uintp instead of np.uint.  I'm not sure what the difference is
remove leftover cmake files
move files from native code into pele propper
the new cpp framework compiles in pele propper

I haven't tried to run anything yet
remove .pydevproject from the repository

It requires that the directory be named pele/
add numerical gradient to cpp base potential
add numerical hessian to the cpp base potential
Merge remote-tracking branch 'upstream/master' into native_code
throw exceptions in cpp base potential

change except * to except + in _pele.pxd

remove mentions to getEnergyGradientNumerical
remove a test that rarely passed
add wrapper and test for LBFGS_CPP

also replace default LJ with cpp LJ
add back in except * rather than except +

use except + only in constructors now

cython has kind of strange behavior.  if a class derives from another
class then __cinit__ is called once for each of them.  This can lead to
memory loss if a pointer is overwritten.  Also, __dealloc__ is called
multiple times as well.

be more careful about deallocating memory.  Do check for if self.thisptr
!= NULL.
add test for cpp LJ
add test for pythonpotential

move CppPotentialWrapper to _pythonpotential.pyx
add test for LBFGS_CPP
clean up the c++ source a bit
add test for cpp BLJ potential
Add test that c++ exceptions are translated to python

also change some "except *" back to "except +".  The function run() in
the c++ lbfgs still must be declared as except * or else the python
exceptions generated by a c++ wrapped callback function kill the program
with no warning.

The "except +" change had to be made because c++ generated exceptions
were not being tranlated back into python.  They were printing a warning
message and killing the program.
save some changes
add "except +" to run() in the cpp lbfgs

this means that all exceptions generated in the python potential will be
ignored.  This is not idea, but we couldn't figure out a way to get both
python and c++ exceptions to be translated back into python. An error
message is printed