fix issue74: Do not escape double character " to \"
additionally properly support WSP in RFC5234, namely:
 - strip \r, \b and \f
 - keep \t as a horizontal tab (not not escape)
update zoneinfo to tzdata2014g
issue87: rename the CMake STATIC_LIBRARY to STATIC_ONLY
to better describe the actual behavior of this setting.
fix issue87: build shared libs only with cmake -DSHARED_ONLY=True
Merge branch 'master' into rscale