Add option to explicitly annotate Java frames with _[j]/_[i]

[nitsanw]

This is not a well broken down PR, sorry. I lumped together some code cleanup/changes here:

• resolving many warnings pointed out by CLion
• refactoring JVMTI deallocation
• splitting out method name cleanup and '.' vs '/' conversion
• annotating inlined vs real frames explicitly. This is more accurate than than the approach taken in FlameGraph/stackcollapse-perf.pl which relies on package names. If this is too much I can split the commit into separate PRs.

With the new options I can have PMA generate this format, which let's BCC tools generate a usable collapased stack directly:

address size package/classname::methodname_[j];package/classname::methodname_[i]

One could argue that the right solution is a map file post processing script rather than further elaboration of the tool itself. Up for discussion.

[nitsanw]

@jrudolph any chance you can take a look?

[nitsanw]

ping?

[jrudolph]

@nitsanw sorry for the silence... busy months. I'll try to have a look soon.

[nitsanw]

@jrudolph well... at least now we know it builds!!! :-)

[nitsanw]

Will update the README shortly