Updated gnemdFoam, mdEquilibrationFoam and molConfig applications to use new separate potential and molecule libraries.  Updated potentialDict description in mdEquilibrationFoam/periodicCube test case to new format.

  * some warnings were spurious with gcc-4.3.0, but gcc-4.3.1 correctly
    flagged these problems:
    - processorLduInterfaceTemplates.C

Changed src/lagrangian/molecule folder to molecularDynamics and split off separate potential library.

parate potential library.

This substantially eases enabling/disabling distributed compiling
For example,
 - export WM_HOSTS="host1:N ... hostN:N"  as usual
 - simply set/unset WM_SCHEDULER

etc/aliases.{sh,csh} added aliases for enabling/disabling wmakeScheduler
 - alias wmSchedON='export WM_SCHEDULER=$WM_PROJECT_DIR/wmake/wmakeScheduler'
 - alias wmSchedOFF='unset WM_SCHEDULER'

Removed wmakeLockScheduler, identical to wmakeScheduler except a 'sleep'

  * use $WM_THIRD_PARTY_DIR variable in top-level Allwmake
  * test new shell idiom for Allwmake files:
        # run from this directory only
        cd ${0%/*} || exit 1
    this might be especially useful when building optional components