moved EXT_frag_depth to community approved
Constructor tests : Added matrix tests

Added matrix tests and interval selection to constructor tests.
Replaced literal name in desciption by targetType

Replaced literal name in desciption by targetType var
Changed building of expression strings

Changed building of expression strings from incremental construction  to
joining array of string parts.
Merge pull request #580 from TiborsHub/master

Constructor tests : Added matrix tests
Typos

Notepad++ found some typos
Merge pull request #583 from TiborsHub/master

Typos
Pass through shader result should always be true

Result of compilation of pass through (vertex or fragment) shader should
always be true and not set to the result of the test
Merge pull request #585 from TiborsHub/master

Pass through shader result should always be true
Revert "getQueryParameter should be getQueryObject"

This reverts commit 0afa2c453b6f2e38614379de9e40cadd625ec15f.

As pointed out by Ken, getQueryParameter is the form taken
by the remainder of the WebGL API.
Merge pull request #586 from grorg/revert-query-parameter

Revert "getQueryParameter should be getQueryObject"
Merge pull request #557 from pyalot/EXT_frag_depth-to-approved

moved EXT_frag_depth to community approved