Add lua info to building part of readme
Fix CPPFLAGS propagation by saving it in m4/ax_lib_geos.m4
Remove non-necessary echo in m4/ax_lib_geos.m4
Merge pull request #103 from jocelynj/cppflags

Fix CPPFLAGS propagation in configure script
Reword 9.1+2.0 suggestions

Frederik's testing showed 9.1+2.0 is substantially faster than 8.4+1.5, so word the paragraph stronger. At this point 8.4+1.5 is old and 8.4 will reach EOL in July 2014.
Merge pull request #113 from pnorman/patch-4

Reword 9.1+2.0 suggestions
Merge pull request #95 from pnorman/patch-2

Add lua info to building part of readme
Fix small typo (tunel to tunnel) in the lua style to make sure the z_order is correct
Merge pull request #114 from jimmyrocks/master

Fix small typo (tunel to tunnel) in the style.lua file to make sure the z_ord...
Merge remote-tracking branch 'upstream/master' into delay_ind