Get test suite green again, via minitest

… after renaming

If you are using the same reporter instance, after multiple file search the files list will be empty

Don`t modify memoized files list

After this change you can dump your profile results to any IO via:

    report = StackProf::Report.new(StackProf.results)
    File.open("profile.dump", "wb") do |io|
      report.print_dump(io)
    end

Pass optional io to Report#print_dump

Fix filtering for Graphviz report

Add option to drop less important nodes for big graphviz output

…iddleware

Add raw option for StackProf::Middleware

middleware: pass raw to start

Create LICENSE

Use #print_method instead of #print_source in README after renaming

Documentation

I had to dive into the C source to figure out how to call StackProf without a block because the methods listed in the README don't show their arguments.

`__LINE__` in test/test_stackprof.rb points profiling targets.
This commit clear where we focus in test cases.

Describe where `__LINE__` points

…porting

Avoid "stack level too deep" error

…_on_reporting

Revert "Avoid "stack level too deep" error"

I'm not sure what commit changed this, but if we don't provide a value
for `Data_Wrap_Struct`, the object won't get marked.  Since the object
doesn't get marked, frames we've collected won't get marked and we'll
get a segv at report time.

Fixes tmm1#58

prevent frames from being GC'd

Don't escape method filter regexp

…porting

Avoid "stack level too deep" error