Don't overwrite ciidx if it is already set.
Add documentation for Android toolchain
add mrbtest verbose mode ('-v' option)
Merge pull request #832 from bovi/compile-readme

Add documentation for Android toolchain
Merge pull request #833 from iij/pr-mrbtest-verbose

add mrbtest verbose mode ('-v' option)
Merge pull request #831 from carsonmcdonald/ciidxfix

Don't overwrite ciidx if it is already set.