Make it works on firefox

element.innerText not W3C compliant
http://stackoverflow.com/questions/1359469/innertext-works-in-ie-but-not-in-firefox
Merge pull request #68 from bfx81/master

Make count html example works on firefox (innerText to textContent)
Follow up on #68, same example in readme.
Hid launchedProcess struct from outside.
Adding new implementation for process that can demux.
Crazy process testing using code from stdlib tests.
Hiding mutex from being public.
Implementing input passing as PassInput which requires another mutex.
Fixed running out of bounds of the array which we shrinking.
Replaced channels to buffered ones. Improved test on simple cat slightly.
Added test that involves concurrent reads and writes to/from cat