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