[Qt] Fill in label from address book also for URIs
qt: Show also value for options overridden on command line

Currently only the name of the option is shown for GUI options
overridden by command line (or configuration file). This commit
adds the value of the options as well, which is useful for
troubleshooting.
qt: Enable and disable the Show and Remove buttons for requested payments history
based on whether any entry is selected.
Merge pull request #3874

caee92d qt: Enable and disable the Show and Remove buttons for requested payments history based on whether any entry is selected. (Haakon Nilsen)
Merge pull request #3867

b40bdd6 qt: Show also value for options overridden on command line (Wladimir J. van der Laan)
Merge pull request #3855

0fde3bb [Qt] Fill in label from address book also for URIs (Cozz Lovan)
Add licenses for tests and test data

- Add license headers to source files (years based on commit dates)
  in `src/test` as well as `qa`
- Add `README.md` to `src/test/data` specifying MIT license

Fixes #3848
Fixed compile error on Debian jessie (gcc version 4.8.2 (Debian 4.8.2-16))
Merge pull request #3891 from laanwj/2014_03_tests_license_mit

Add licenses for tests and test data
Merge pull request #3895

74f66a5 Fixed compile error on Debian jessie (gcc version 4.8.2 (Debian 4.8.2-16)) (Meeh)
doc/README.md: remove 'rc' label for 0.9.0 version, in title
0.9.0 release notes