Re-add AllocatedStringBuffer output

Re-add the string buffer allocation statistics to the trace summary,
it accidentally got lost in a previous code cleanup.
debugscope to readconsole in gnuwin32
debug scopes in readconsole
function for extracting a function name from SEXP
dynamic allocation for scopenames
disabling output until needed, trying to detect debugbla
extracting function name from sexp - nothing done with it
function to print function name
temporarily disabled function name extraction (in eval)
debugscopes with less dynamic name copy - but enough malloc space
countContexts in debugScope
finally, R function name is extracted and passed to debugscope-start and end
Merge branch 'master' into debugscopes