dev-haskell/gtksourceview/gtksourceview-0.12.5.0.2: fix x11-libs/gtksourceview:2.0 dependency
dev-haskell/dbus-core-0.8.5.4: fix dependencies

'binary >= 0.6' to make it avoid using ghc bundled 'binary' package
dev-haskell/dbus-client-0.4.1: fix dependencies

also fix a grammar error to compile under ghc-7.6.3
try to build manatee-core under ghc-7.6

manatee-core builds successfully, but manatee gets error when start:
'thread blocked indefinitely in an MVar operation'
Merge manatee fixes from ustcscgy (pull #293)