[net-libs/tox] rework ebuild

* use autotools instead of unreliable autotools-utils
* fix dependencies
* general ebuild style improvements
* allow running tests
* add USE flags for logging levels (don't use REQUIRED_USE here)
* add static-libs USE flag
* add conf.d file for controlling arguments of the daemon
[net-im/venom-av] rework ebuild

* fix dependencies, (add missing slot for sqlite,
  depend on net-im/tox[av], depend on gettext)
* don't depend on gcc, people may use different compilers,
  do the checks in pkg_pretend instead and only for non-binary packages
* general ebuild style improvements
[net-im/utox] rework ebuild

* general ebuild style improvements
* fix dependencies, add missing deps and USE flags
* although patches suck in live ebuilds,
  use a proper patch instead of the sed (pull request sent upstream)
* update icon cache and mime database
[net-im/qtox] rework ebuild

* fix dependencies
* remove bogus pulseaudio USE flag (users rather set these globally
  and the USE flag does not change anything build-time, so print
  a warning instead)
* check gcc version in pkg_pretend and only for appropriate cases
* properly use eqmake5 from qmake-utils
[net-im/tox-gui-qt] use qmake-utils, style improvements
[net-im/venom] rework ebuild

* fix dependencies, (add missing slot for sqlite, depend on gettext)
* don't depend on gcc, people may use different compilers,
  do the checks in pkg_pretend instead and only for non-binary packages
* general ebuild style improvements
Fix repoman warnings
[net-im/toxic] rework ebuild

* general ebuild style improvements
* drop unused eutils.eclass
* fix dependencies, rm obsolete deps
* respect CC, CFLAGS, LDFLAGS
* make build verbose