Merge pull request #13 from mlund/master

Update July 2014
asd
Merge pull request #14 from mlund/master

Post-vacation update
Merge pull request #15 from mlund/master

Update
Sticky wall, hydrophobic wall, etc. Unsolved problem with the wall collision.
new LJ, r6 and r3
little detail with indentation
comment edit
Sticky wall seems bug free. Untested hydrophobic wall.
Hydrophobic wall works as well.
Lesser details. Looks ready for proper testing by Kristin.
Linear pot. now nested inside StickyWall with all other potentials.
Add image test.
Forgot to add 'LINEAR' to the enum list.
Solved bug regarding a missing bracket.
Fixed warning and template.
Edited code according to Mikael's comments.
Merge pull request #59 from jmhenriques/master

Major revisions and additions to the former HydrophobicWall class, now aka. StickyWall.