Remove Why I2P from the welcome wizard. Make the welcome wizard more informative about the functionality contained within I2P. Tweaks to stylesheets on the welcome wizard.

re-name full color logo(logogrey7.png=>wizardlogo7.png) used in welcome wizard and remove the old redundant ones.

Tweak position of headings and infoboxes in welcome wizard, switch to full-color I2P logo on all pages

Remove null checks, _target can't be null

improve appearance of textareas and inputs when the text inside is highlighed, on the i2ptunnel dark theme

new images for the install wizard, re-name the images, even up the font sizes on the bandwidth configuration pages

More ngettext
Hide some text for config advanced

to get the 4.0 dtds
Put servlet version on the logs page

Better error message on the router side

Blinded flag bit goes on the inner LS, not the outer
Fix corruption of inner signature
Broken in 0.9.42

- Don't generate revocation key for LS2
- Fix generation of persistent revocation key for LS1
- Fix persistent private keys without persistent revocation key
- Don't put unconfigured private keys in leaseset
- Don't strip i2cp.leaseSetPrivateKey from config before it's used

Store destination in outbound session
Allow sending null data through OCMOSJ for ratchet acks; omit data clove
Only call messageDeliveryStatusUpdate() for nonzero nonce

as reported at http://zzz.i2p/topics/2901 post #5

Adapted from i2speed / jogger
ref: http://zzz.i2p/topics/2894 item 5

Adapted from i2speed / jogger
ref: http://zzz.i2p/topics/2894 item 5

Adapted from i2speed / jogger
ref: http://zzz.i2p/topics/2894 item 1

Switch Bionic to 9.x
Disco+ already on 9.x
Xenial remains on 8.x
Update dependencies doc