fix if we use DIFFERENT_NONZERO_PATTERN
up conforme localization
minor up
some fix and clean
add test
add test
Fixes issue 50

now the dof table is built for vectorial periodic conditions
try to fix conflicts with Eigen namespace
update: simplify
fix problem with gflags re-arranging argv, it screws up badly petsc/slepc
use pointer version of anycast<>, it makes the code flow easier to read
add int and size_type version
use Environment::worldComm()
moved periodic example to manual
oops
Fixes issue 52
use mean + simplify
Update issue 51

start work on issue 51, not yet finished
move any_cast logic to mesh data structure
periodic has been moved in manual
fix