"<qt/>" ToolTipToRichTextFilter bug.

This very old GUI bug in ToolTipToRichTextFilter() that tooltip.startsWith must be "<qt>" and "<qt/>" must be end. This already fixed in Bitcoin source tree.
GUI: improve mining page
Show minng in gui if it was enabled with setgenerate true in spreadcoin.conf
Enable mining to separate address
Merge pull request #2 from awoland/patch-1

"<qt/>" ToolTipToRichTextFilter bug.
Merge branch 'master' of https://github.com/spreadcoin-project/spreadcoin
Increase version
Update README.md
Update README.md
Do not keep key when mining to specific address
Fix incorrect generated amount in explorer
json rpc mining (not tested)
Minor fixes
plot dif
Add parameter to simplify mining
Version 9.14.4
Merge remote-tracking branch 'upstream/master'