initial data for testing an ala-ala-ala sequence
initial xcamshift potetial with selection or pre and prior residues
init set of bb shift parameters for all residues except gly and pro from
camshift 1.35.0
convert table files to yaml due to a lack of comments and multi-line 
strings in json
initial implementation using yaml
initial implementation of table manager completed
added ability to get the available set of to and from keys and offsets
unified nomenclature of H to HN
added random coil data table
corrected yaml format error
added support for non residue tables and  partial support for loading 
random coil shifts
corrected inversion of from and to atoms replaced zero entries by null
values
added random coil table and support in test and table manager classes
added initial random coil table implementation
add support for accessing the a default table manager
add segment manager and tests
correct error in calculating segment length
now returns None for unknown values
change name of access to random coil table
added random coil potential and tests