create spy field plus small refactor for future conver to local spy. Issue 3
wip on spy proposals.
convert to spy precondition checks. Issue#3
little refactoring for Issue#3
Merge branch 'spy'

Conflicts:
	plugins/pl.greenpath.mockito.ide.refactoring/src/pl/greenpath/mockito/ide/refactoring/quickfix/MocksQuickFixProcessor.java