Note on MD codes
Typo in doc
Merge branch 'v2.0' into v2.1
Typo in doc
small paragraph added
Merge branch 'v2.0' into v2.1
Improved gromacs specific doc

Closes #113
Merge branch 'v2.0' into v2.1
Updated doc for gmx 5.0

related to #113
Merge branch 'v2.1' into v2.1-openmp