added and improved some buffer functions: renamed eb_get_str to eb_get_contents fixed buffer size issues in eb_get_line fixed utf-8 issues in eb_get_strline added eb_prev_line added eb_goto_bol2: computes number of code points skipped added eb_goto_eol
added and improved some buffer functions:
renamed eb_get_str to eb_get_contents
fixed buffer size issues in eb_get_line
fixed utf-8 issues in eb_get_strline
added eb_prev_line
added eb_goto_bol2: computes number of code points skipped
added eb_goto_eol

dmacvicar/qemacs,dmacvicar/qemacs,dmacvicar/qemacs,dmacvicar/qemacs