Add experimental cmake build system.
This is only or dveleoper experimentation.
Preliminary directional apostrophe support.
Add Sergio to list of direct contributors.
Remove uncalled and unsupported code paths in tokenstream utils.
Add Wall target to cmake build system.
Remove uncalled relation io code and amend durs debugging.
Remove uncalled functions which are unnecessary for bellbird.
Remove unused viterbi algo. code.
Remove unused string_before code.
Add reference in readme to now tested directional apostrophe
support.
Remove cst_dbgmsg since it is a once used alias unneeded for Bellbird.
Minor change to error handling returning 1 rather than 255.
Removes unused debugging abort code also.
Remove insufficiently general wchar support.
Remove unused cst_track functions.
Remove unused cst_wave_rescale function.
Remove unused relation_prepend function.
Remove header info for unwritten sibling functions.
Remove cst_lts_rewrites code as not relevant to current bellbird.
Use correct data type depending on whether int or long int
in printf statement (This depends on architecture).
Use %td format for ptrdiff_t data types (see: http://stackoverflow.com/questions/3597743/where-is-ptrdiff-t-defined-in-c )