relax SVN archive

Added systemtest: Relax_disp.test_bug_22477_grace_write_k_AB_mixed_analysis and data.

This is for bug:
bug #22477(https://gna.org/bugs/?22477): Not possible to perform grace.write() on k_AB parameter for mixed CPMG analysis.

Citation fix in relax manual.

Equation fix for $kex$ in manual.

Modification to the relax manual, regarding the Linear Constraints for the exchange rate.

Inserted Latex bibliography for reference to Linear Constraints of the exchange rate.

Small fix for systemtest, where precision is lowered on digit after altering the linear constraints.

Modified the Linear Constraints for the exchange rates.

For CPMG, the maximum kex should be 10^4, and for R1rho it should be 10^5.
This is altered from the value of 10^6.

The suggested restraints for 'kex' follows from article, on page 224:

Nuclear Magnetic Resonance Methods for Quantifying Microsecond-to-Millisecond Motions in Biological Macromolecules.
Palmer-III, Arthur G., Kroenke, Christopher D., Loria, J. Patrick
Nucl. Magn. Reson. Biol. Macromol. B, 2001, Vol: 339, pages 204-238.
U{DOI: 10.1016/S0076-6879(01)39315-1<http://dx.doi.org/10.1016/S0076-6879%2801%2939315-1>}

Fix for systemtest Relax_disp.test_r1rho_kjaergaard_missing_r1, running on 64 bit system.

Removed triggering an error in test_r1rho_kjaergaard_missing_r1.

There is a bug fetching the standard value of parameter 'r1_fit'.

Removed merge tracking for "svnmerge" for
svn+ssh://tlinnet@.../svn/relax/branches/R1_fitting