Add source properties to many more types of data

Add source properties to many more types of data

* libguile/read.c (scm_read_array): New internal helper that
  calls scm_i_read_array and sets its source property if the
  'positions' reader option is set.

  (scm_read_string): Set source properties on strings if the 'positions'
  reader option is set.

  (scm_read_vector, scm_read_srfi4_vector, scm_read_bytevector,
  scm_read_guile_bitvector, scm_read_sharp): Add new arguments for the
  'line' and 'column' of the first character of the datum being read.
  Set source properties if the 'positions' reader option is set.

  (scm_read_expression): Pass 'line' and 'column' to scm_read_sharp.

* doc/ref/api-debug.texi (Source Properties): Update manual.