Update README.md
Merge branch 'develop'
added HAVE_STDMUTEX_H check for c++11 mutexes detection
#3: added install target to build; turn on WITH_TESTS by default
fixed path separator
fix for #4
Merge pull request #5 from snikulov/issue_4

fixed issue #4
fixed installation for missed *.tcc files
added config.h generation to build