added list utils  {min,max}*_by, uniq_by, classify
support added for 5.20, dropped for 5.10
added _::chomp and _::index to function index
_::caller: fleshed out docs and interface
added tests, rounded off interface
added names to tests
implemented CallStackFrame, fixed tests
implemented _::caller and _::callstack
cleanup
added documentation for _::caller return value
cleanup
hide a require test from dependency discovery
fixed small bug with automatic semicolon insertion

in perls 5.12 and 5.14
fixed _::caller->is_eval->source test

on older perls, a "\n;" would be injected at the end of the eval source,
for whatever reason. This previously caused the test to fail.
implemented _::caller, fixes #6

* feature/caller:
  fixed _::caller->is_eval->source test
  fixed small bug with automatic semicolon insertion
  hide a require test from dependency discovery
  cleanup
  added documentation for _::caller return value
  cleanup
  implemented _::caller and _::callstack
  implemented CallStackFrame, fixed tests
  added names to tests
  added tests, rounded off interface
  _::caller: fleshed out docs and interface
fixed small POD issue
support for perl 5.10 now experimental