Merge pull request #12 from snoweye/master

update for mpiP
09.22.13 starting to clean up plot_mpip()
09.22.13 plotting interface to grid unified and simplified
09.22.13 improved mpiP plots
09.22.13 nightly
updated example tex
09.23.13 nightly
vignette updated not complete
Merge branch 'master' of https://github.com/RBigData/pbdPROF
added and commented new plot device code x11
added help for mpiP installation support
09.23.13 more improvements to plotter
09.23.13 grid_plotter fixed
09.23.13 vignette numbering now a command
09.23.13 plot merge
09.23.13 message statistics plots fixed
09.23.13 message statistics plot labels fixed
09.23.13 message statistics plot labels fixed
09.23.13 more minor edits
minor addition in installation