relax SVN archive

Full fix for bug #20378 (https://gna.org/bugs/index.php?20378).

As no RelaxError is no longer raised in this Bruker.test_bug_20152_read_dc_file GUI test (well only
in the command line operation of the GUI tests), instead the current data pipe is checked to make
sure no relaxation data was loaded.

Partial fix for bug #20378 (https://gna.org/bugs/index.php?20378).

The gui_raise() function was operating differently under the command line run test suite and the GUI
run test suite. The operation of the function is now consistent, and no RelaxError is raised
(unless the raise_flag argument is set).

Merged revisions 18167 via svnmerge from
svn+ssh://bugman@.../svn/relax/trunk

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r18167 | bugman | 2012-12-18 11:55:08 +0100 (Tue, 18 Dec 2012) | 3 lines

Syntax error fix for the last commit.
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Syntax error fix for the last commit.

Merged revisions 18164-18165 via svnmerge from
svn+ssh://bugman@.../svn/relax/trunk

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r18164 | bugman | 2012-12-18 11:48:26 +0100 (Tue, 18 Dec 2012) | 3 lines

Added the 'units' argument to the frq.set user function to allow values other than Hz to be input.
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r18165 | bugman | 2012-12-18 11:52:35 +0100 (Tue, 18 Dec 2012) | 3 lines

The frq.set user function now warns if the frequency is lower than 100 MHz or higher than 2 GHz.
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The frq.set user function now warns if the frequency is lower than 100 MHz or higher than 2 GHz.

Added the 'units' argument to the frq.set user function to allow values other than Hz to be input.

Removed some temporary debugging code.

The select.domain user function backend now uses the boolean_select() function.

Merged revisions 18160 via svnmerge from
svn+ssh://bugman@.../svn/relax/trunk

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r18160 | bugman | 2012-12-18 11:22:11 +0100 (Tue, 18 Dec 2012) | 6 lines

Shifted the boolean selection operations of the generic_fns.selection module into two new functions.

These are the boolean_select() and boolean_deselect() functions. The change removes much duplicated
code which could be a source of bugs in the future.
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