Added gro2cfg and cfg2pdb with respective folders.

The programs added are tools to use in assisting conversion from
GROMACS .gro to DL-POLY CONFIG and CONFIG to PDB, to use in RASMOL.
Descriptions corrected
Correction to the surf plane algorithm
Improvements to surf plane (with errors)

Segmentation fault! Needs correction still.
Error correction and new criteria

Corrected segmentation error, added new neighbor criteria
More readme
Readme
Readme, more description and information

Information about the utilities added.
sufangle all angles

Register all the calculated angles in a time step as well as the
averages.
surfplane

Changed the writing to write x,y and z coordinates for the point.
Correction to angle units in surfangle
surfplane
surf plane new conditions to be on the surface, new file in test folder
with all points.
New surf angle feature, angle histogram for each time step.
Merge branch 'master' of github.com:xipasduarte/simutil

Conflicts:
	test/surfangle/HISTORY-ANGLE
surf angle histogram output ready for mathematica input and treatment.
New utility cutz

Delete water molecules below a defined z. Reindex all atoms.
surfangle with errors

Bondry conditions implemented. Has an error doing a subtraction of two
variables.
cutz description in README
Corrected missing elements on cutz