Merge pull request #116 from jitlogic/dev1

Dev1
Fix NPE in trace attributes / method attributes panel.
New tracer function: tracer.formatAttr(attrName, formatString)
Checksumming spy processors: spy.crc32sum(), spy.md5sum(), spy.sha1sum() and ordinary versions in zorka.* lib.
New layout for method attributes dialog.
Login screen: embed CSS into login HTML file.
Adjust size of method search dialog.