GraphHelper minor cleanup

change SybilRenderer forms to POST,
only collect RIs on required Sybil tabs

Adjust IP points

Make Analysis class a JobImpl, run on configured frequency
Bug fixes and cleanups

Make Analysis class singleton, hang off ClientAppManager
prep for offline scheduling

Load/store offline analysis
Split up sections into separate tabs

Minor speedup in HMAC256

Fixes compatibility with Jetty 9.4
Patch from Emmanuel Bourg, see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916177
Briefly tested by mhatta

- Use arrays for exec
- Randomize temp file name
- Require quotes around args containing spaces in routerconsole.browser property
- Add debug logging
- Add chromium-browser to the default list
- Parse and use full command line from Windows registry
- Replace %1 with url in registry line and routerconsole.browser property
ShellCommand:
- Switch to i2p logging