Remove install.md

Issue #101
This is being handled in build.md.
Change starsha to use '\n' instead of std::endl in most cases

This will speedup output, especially when using --print-cmds. std::endl forces a flush of all output, which inevitably slows things down.

We keep the flush when we're in exceptional states to force the messages out ASAP
MOAR DOC CHANGES

Issues #87, #101

* Include make test(_lang) in both quick start sections, marked
optional but recommended
* Clarifications in make test, make test_lang sections
* Add make test_build section
* Add starsha infinite loop bug to troubleshooting
Merge pull request #130 from cmaloney/starsha_fixes

Change starsha to use '\n' instead of std::endl in most cases
Merge pull request #129 from vmbrasseur/master

Additional build.md changes