Added 'invert_symmetric' and 'solve_symmetric' functions.
Added 'symmetrize' function.
Added tests for recently added functions.
Fixed bug in 'solve_symmetric'.
Fixed 2 bugs in header2fits_() preventing saving some headers with extensions or groups, and handling of logical values.
Now printing double precision numbers for more digits in strn().
Added move semantics to srq() and invsqr().
Improved performances of linfit().
Updated subregion().
Changed sort() to be a stable sort operation (slower but more intuitive results).
Improved qstack() to be able to keep NaN pixels (for median stacking).
Added 'prophy++' compiler that does profiling on optimized binaries.
Added find_source and psffit tools.
Added 'keepnan' option to qstack2.
Updated make_refgen.sh for libclang-3.3 name change.
Added nan(), made min(), max(), min_id() and max_id() faster by using more appropriate std algorithm and doing the NaN filtering in place.
Fixed fits::read_table() with structure being 'loose'.
Fixed error messages when a FITS error occurs in named parameter reading.
Improved qxmatch2 to be able to specify the position variable inside the FITS files.
Fixed unit_test for new double printing precision.
Added tests for min() and max().
Added the range iteration and its unit tests.
Started using it in image functions.
Added make_cmd().