close #327

refactor EDS documentation to fit into Camilloni submodule format, and add reference to new paper describing some features of the module (#293)

Add extended adaptive biasing force or dynamic reference restraining method

Add extended adaptive biasing force or dynamic reference restraining method

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Notice that as of now it is not fully integrated in the plumed
reference/ module. However, it is possible to compute
ERMSD from a given structure and to use it as a CV

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I added an example similar to the one that I provided
on the mailing list about how to mimick
POINT_FROM_AXIS and PROJ_ON_AXIS

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I combined the 5-membered rings implementation with
a 6-membered ring one so that PLUMED can treat both cases

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in MOLINFO added 2 new MOLTYPE for nucleic acids: “rna” and “dna”
components are: “@epsion-#”, “@gamma-#“, “@beta-#“, “@alpha-#“,
“@zeta-#“, “@chi-#”, “@v{0..4}-#“, “@base-#”, “@sugar-“ and “@back-#”

in PUCKERING the components are: “.phs”, “.amp”,“.Zx”,”.Zy”
derivatives are calculate only for “.Zx” and “.Zy”
(cherry picked from commit 58bf3be6341db37ab032c58e2767c55848a75492)

Conflicts:
	user-doc/bibliography.bib

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New bias allowing to introduce fictitious CVs so as to allow indirect
metadynamics (Iannuzzi et al) and TAMD/dAFED