Allow n partitions for ActivePatterns instead of a max 7

**Submitted by Steven Taylor on 3/25/2014 12:00:00 AM**
**23 votes on UserVoice prior to migration**

Active patterns can only have seven partitions (see: http://msdn.microsoft.com/en-us/library/dd233248.aspx)
It would be good if this was a stylistic constraint that could be overridden if desired.
For example, if active patterns are getting used to split up XML nodes meaningfully, you aren't in control of how many nodes sensibly fit into the top level.

**[Original UserVoice Submission](https://fslang.uservoice.com/forums/245727-f-language/suggestions/5676471)**
[Archived Uservoice Comments](../tree/master/archive/suggestion-5676471-allow-n-partitions-for-activepatterns-instead-of.md#comments)

Start by reading the linked MSDN documentation for active-pattern partitions and the archived UserVoice comments. Review the existing discussion to identify design and compatibility concerns. Done should mean a concrete, agreed proposal for allowing more than seven partitions while preserving a clear opt-in behavior.

Written by the indexing model from the issue text.