Add @borkmann's timedb to the list of projects using Sharness
Tweak link to rdd.py tests
Add alternatives to Sharness to README
Merge branch 'next'

* next:
  Add alternatives to Sharness to README
  Tweak link to rdd.py tests
  Add @borkmann's timedb to the list of projects using Sharness
Add shUnit2 as alternative to README
Add shspec as alternative to README
Don't set a variable and export it at the same time

Some shells do not permit the form "export VAR=value", instead requiring
the variable to be assigned before it is exported.  Most places already
do this, fix those that don't.

Signed-off-by: John Keeping <john@keeping.me.uk>
Allow users to override the test extension

Signed-off-by: John Keeping <john@keeping.me.uk>
Merge pull request #6 from johnkeeping/allow-extension-override

Allow extension override
Update API.md with `make doc`
make: add install and uninstall targets
Add AGGREGATE_SCRIPT variable to test/Makefile
Remove superfluous SHARNESS_TEST_DIRECTORY assignments from basic.t
Fix up paths in installed examples
Let Travis test installed examples
Add installation instructions to README
Merge pull request #5 from mlafeldt/install

Allow to install Sharness via Make
Add vi format to sharness.sh
Remove TEST_INSTALLED; use SHARNESS_BUILD_DIRECTORY instead
Export and unset multiple variables per line