add input files for autoconf and automake

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add autogenerated files

Files generated by autoreconf -rfi

Signed-off-by: Cristian Stoica <crististm@gmail.com>
ignore autoconf cache files

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add a stronger test for CXX11

Signed-off-by: Cristian Stoica <crististm@gmail.com>
extend tcl checks

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix pthread tests for c++ compilers

Signed-off-by: Cristian Stoica <crististm@gmail.com>
fix zlib tests for c++ compilers

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add autoconf suppport for both system or local zlib

Signed-off-by: Cristian Stoica <crististm@gmail.com>
regenerate files after macro patches

Signed-off-by: Cristian Stoica <crististm@gmail.com>
zlib: consume config options

Signed-off-by: Cristian Stoica <crististm@gmail.com>
zlib: do not track generated Makefile

Signed-off-by: Cristian Stoica <crististm@gmail.com>
Check for cxx11 support as reported by autoconf

Signed-off-by: Cristian Stoica <crististm@gmail.com>
add Readme for autotools maintainers

Signed-off-by: Cristian Stoica <crististm@gmail.com>