Merge pull request #84 from andrusha97/v0.11

Fixed building on some systems again.
Fixed RHEL6 builds.

Conflicts:
	cocaine-bf.spec
Remove boost-python from BuildRequires
Merge pull request #88 from noxiouz/v0.11-spec-patch

Cherry-pick commits from master-branch cocaine-bf.spec
Build json library as static one

If STATIC keyword is not specified this library is build either
shared or static depending on distributive settings which differ
for RHEL/Fedora and Ubuntu/Debian
Removed out-of-dated Fedora patch

Looking for Boost library was already fixed in 8f7e6c96, so this
patch can be removed
Merge pull request #99 from euroelessar/v0.11

Fixed build on rpm-based platforms
Bump version - 0.11.2.3.