fix keyboardlayoutwidget
improved _Call.when() method

Improved when() method for floating window
Rearrange logic a bit
Changelog for 0.7++
Only have a version number in one place
Update install instructions

We don't need a source version of libxcb.
We can do better than forcing people to define a custom xsession.
Clean up installation process

* Use distutils instead of setuptools, since setuptools' find_package seems to
  ignore exclude, and we install the tests which is dumb
* Don't include a bunch of stuff in the manifest file that is unused
* manually install the battery icon resources
Version bump for Trusty Tahr
Fix ExtraFallback regression in configurable

Was broken by c8dbc66aee2df20a483582bd85ecc0dc50ebafc5
add GmailChecker textbox widget

Closes #392

Signed-off-by: Alexandr Kriptonov <alexandr.kriptonov@gmail.com>
Revert "Ensure WithdrawState windows stay unmapped on restart"

This reverts commit c8eda724dfabfa5288b56ffdd084a4765561813d.

There might (?) be a problem with this, so reverting temporarily before 0.7.0
is tagged.
Merge branch 'develop' into master
Release 0.7.0
Clean up documentation headers

Some day I will get all this right. Some day.