SpringPlugin: clear parameter names cache on reload
Upgrade to asm-5.0.2

This ASM has a different visitMethodInsn() instruction so
there are big changes throughout the code. The tests are running
fine but as new testcases are added related to Java8 we may need
further fixes to take account of the extra isInterface parameter
on visitMethodInsn()
correct eclipse settings
polish
asm 5 changes for visitMethodInsn
Performance work

1. types now keep track of their subtypes, enabling smarters checks
   after reloading: "has anything in my hierarchy been reloaded?"
   instead of "has anything at all been reloaded?"

2. Building on that, caches related to info built during reflective
   calls like 'getDeclaredMethods()' and 'getMethods()' is cleared
   from types (and subtypes) during reload. The caches will
   subsequently be rebuilt/reused on the next request for that
   info.

3. New guards in ivicheck/etc: 'have things in my
   hierarchy been reloaded?'
Allow for class not yet loaded when rewriting invokedynamic
Fixes #55: not respecting cacheDir if not in grails profile