The regex helpers were converting strings to regex-tdfa regular
expressions on the fly every time, but this appears to be quite
expensive. The simplest memoisation lib seems to solve it nicely.
Make these modules' names more like the heavily-used types they
define (CliOpts, UIOpts, WebOpts). This is consistent with
RawOptions and ReportOptions, and helps with code navigation.
The balance command's --format option (in single-column mode) can now
adjust the rendering of multi-line strings, such as amounts with multiple
commodities. To control this, begin the format string with one of:
%_ - renders on multiple lines, bottom-aligned (the default)
%^ - renders on multiple lines, top-aligned
%, - render on one line, comma-separated
Also the final total (and the line above it) now adapt themselves to a
custom format.
We should now read all text in universal newline mode, so eg journal
files with DOS/windows line endings are fine.
This also deprecates and disables our IO encoding compatibility layer,
which prevented many encoding-related problems with certain platforms
and GHC versions. With modern GHC (7.x) this is now hopefully totally
unnecessary, but the module remains in place just in case.
