dev-haskell/diagrams-gtk: Depend on gtk2

Specifically depend on a :2 version of dev-haskell/gtk.
darcs.eclass: make patch cache persistent across darcs runs

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-util/threadscope-0.2.3: Depend on gtk2

Specifically depend on a :2 version of dev-haskell/gtk, exactly as
threadscope-0.2.2-r2 does.
Merge pull request #320 from atlaua/pu1

GTK2 dependencies
haskell-cabal.eclass: limit amount of parallel ghc threads down to 4

Many threads can severely degrade performance.
vikraman's stats for hoogle are:
    41 seconds with -j1
    4 minutes with -j16
    36 seconds with -j2
    33 seconds with -j8
    33 seconds with -j6
    32 seconds with -j4
  Q: is it a 8-core box?
  A: yes a core i7

Let's go conservative for now.

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/esqueleto: disable hung tests

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/openssl-streams: allow new network
epic: It is necessary to run happy to generate the files with >=ghc-7.8
dev-haskell/vty-ui: allow ghc-7.8 (reported by rootzlevel)

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/concurrent-extra: bump up to 0.7.0.7

Package-Manager: portage-2.2.10_p15
dev-haskell/derive: bump up to 2.5.16

Package-Manager: portage-2.2.10_p15
dev-haskell/geniplate: bump up to 0.6.0.4

Package-Manager: portage-2.2.10_p15
dev-haskell/highlighting-kate: bump up to 0.5.7

Package-Manager: portage-2.2.10_p15
dev-haskell/hourglass: bump up to 0.1.2

Package-Manager: portage-2.2.10_p15
dev-haskell/hssyck: bump up to 0.52

Package-Manager: portage-2.2.10_p15
dev-haskell/html-conduit: bump up to 1.1.0.5

Package-Manager: portage-2.2.10_p15
dev-haskell/http: bump up to 4000.2.14
dev-haskell/juicypixels: bump up to 3.1.5.2

Package-Manager: portage-2.2.10_p15
dev-haskell/largeword: bump up to 1.2.3

Package-Manager: portage-2.2.10_p15
dev-haskell/ldap: bump up to 0.6.10