richard/projet_court: Réimplémentation du programme DSSP en Python

Réimplémentation du programme DSSP en Python

Thomas Forest e363f37ce0 Improved bridges exhaustive search		5 lat temu
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atom.py	Improved bridges exhaustive search	5 lat temu
dssp.py	Improved bridges exhaustive search	5 lat temu
geometry.py	Improved bridges exhaustive search	5 lat temu
pdb.py	hydrogen interaction formula + turns and bridges first implementation	5 lat temu
structure.py	Improved bridges exhaustive search	5 lat temu