v0.3

• unofficial Debian/Ubuntu packages
• added jacobian for temperature-dependent conductivity
• updated LE10 benchmark
• read time-dependent functions in .msh files
• detect/handle hanging nodes
• muti-dof BCs using expressions for mechanical 0=expression of space
  & displacements
• volumetric forces in mechanical
• stress linearization according to ASME VIII Div 2 Sec 5.
• tangential and radial symmetry as multi-dof BCs using the penalty
  method
• solve (small) systems of non-linear equations given as expressions
• functions over meshes using vectors
• argument --pdes lists the available PDEs FeenoX can solve
• auto-detect PDE directories: if one adds or deletes one directory
  from src/pdes FeenoX will compile anyway.
• faster direct inversion of 3x3 matrices using code from PETSc
• separated initial conditions from initial guess