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TODO: be consistent with thumbnail generation, where the value is converted to canonical form first.

Added ScriptDefault type, a wrapper that indicates that a value is in the default state. This will replace Defaultable<>

formating; explicitly return nil from text_to_color on failure. The latter is needed because a warning will be added to 2.0.1 about missing returns (not yet in trunk)

use correct border style instead of always using wxBORDER_THEME. This issue is fixed in wxMSW 2.9, but we are not ready for that yet.

This means that we no longer need to pass smart pointers to this in thisP arguments, since we can construct a new intrusive_ptr to the same object from a regular C++ pointer.

(This change is manually merged from the non_null_pointer branch)

This means that we are more explicit about type conversions.

allow opening set files in directories from File->Open dialog: they were returned as "x.mse-set\set.mse-set". Strip the last part.

Replace shared_ptr<InputStream> in Reader class with a regular reference, the thing that calls reader can take care of the lifetime of the stream.

Replace shared_ptr<OutputStream> in Writer class with a regular reference, the thing that calls writer can take care of the lifetime of the stream.

 * renamed 'tag' variable to 'reflector', which better describes its purpose
 * removed addAlias stuff, instead check for matching names 'manually'
 * removed backwards compatibility with <0.3.0 for templates, they are going to break anyway.

Fix #68: don't calculate list of fields sorted by tab order, just find the next/previous ones on the fly

Moved tab_index to Style (instead of Field), it makes more sense there, since it pertains to the layout of stuff on the card.
Added fancy mouseover effect to field borders. This might be slow, so I should add a setting to disable it.