Merge pull request #13 from jibsen/master

Use standard C function rand
Always break line to print "FAIL" unless at column 0.

Also, ensure that all `if` statements are braced.
Add a package.json file for clib(1) support
package.json: Correct version number
Merge pull request #15 from stephenmathieson/add/clib-support

Add a package.json file for clib(1) support
Add H1 heading, move sub-headings to H2
Add available assertions section
Merge pull request #16 from telemachus/README

Readme: list of assertions and nest subheadings