Revert "json-builder.c"

This reverts commit 49b2f2def770ce2a3e0153143229c837f735d4b1.
Revert "Change %g to %f to scanf doubles when building JSON doc."

This reverts commit c312e792e21aab1c4a7c98375e80560f82f3ce4e.
Ignore NetBeans project and revert two commits