make: Add ax_lib_sqlite3.m4, etc. to m4 directory so that autogen.sh works out of the box. Refs #1064.
make: In INSTALL, in the Development section, remove instructions to download ax_lib_sqlite3.m4, etc. since they are now in the distribution. Refs #1064.
Merge branch 'issue/1064-add-m4-files-for-autoconf'. Refs #1064.
http://redmine.named-data.net/issues/1064