reports: change report separator from ; to ^

; is reserved.

From RFC 1738, Uniform Resource Locators (URL):

Many URL schemes reserve certain characters for a special meaning:
their appearance in the scheme-specific part of the URL has a
designated semantics. If the character corresponding to an octet is
reserved in a scheme, the octet must be encoded.  The characters ";",
"/", "?", ":", "@", "=" and "&" are the characters which may be
reserved for special meaning within a scheme. No other characters may
be reserved within a scheme.

Also (from http://en.wikipedia.org/wiki/Query_string):

W3C recommends that all web servers support semicolon separators
in addition to ampersand separators to allow application/x-www-form-urlencoded
query strings in URLs within HTML documents without having to entity escape ampersands.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
reports: fix parsing of dimensions with grouping

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
reports: don't add the day column twice, if specified

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
reports: allow _ in column names

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
reports: alias case statements

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
NEWS: updates for release

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
reports: fix potential NPE

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>