adding linkflags to statically link libgcc and libstdc++ into the shared library (works for libs compiled with -fPIC option)
adding shared library to the Makefile
adding static flags for shared lib
Merge with master
disabling pthread in gtest
overriding DEFINES_GTEST_SHARED for crosslinux builds
removing gtest specific flags
Merge pull request #3 from steinwurf/standalone-shared-lib

Standalone shared lib