* OpenMP changes to allow setting the number of threads from main code
furthermore avoiding to call getenv more than once (it is faster)

* setOpenMP: gromacs patch enabled to set the number of openMP threads

* OpenMP: moved static variables inside  a struct/function couple

* OpenMP: removed api interface and gromacs patch

* astyle

defined then just use one thread

@giovannibussi right?

- dumpgrid
- pca
- mds

LDFLAGS were overwritten by mistake by CFLAGS when doing coverage

this makes the link visible also when browsing with a mobile

Closes #354