collapse_text 6.x-2.1-beta1

This really should be 6.x-3.0, but I only realized that way late.

This version is almost completely rewritten. It has parity with the features of the D7 version.

Changes:
- rewrote the algorithm to be less dependent on one major recursive regular expression. This means that it is less likely to cause memory problems or WSODs. It also makes it easier to enhance it in the future.
- the "style=" option should now be "class=". The old name is supported, but going forward "class=" should be used.
- "title=" and "class=" values should be enclosed in quotes. The module tries to support the old syntax, but I'm sure there are all kinds of edge cases that it will fail at.
- you can now start with [collapsed] instead of [collapse collapsed].