Testing the interpolated result and tempo2 result
T2 general2 out put earth position and tt2tdb correction
a better labeled plot
Fixed bugs with SKIPed TOAs and END
Added a directory for tests
Fixed problem with TIME and PHASE flags not updating.  Added test.
Added test to ensure that JUMPs increment
Merge branch 'paul'
Merge branch 'jing'
Add test_parfile.py
timing_model: parse fortan exp notation (with 'D')
Fixed a bug reading 1-character obs codes in Tempo2 TOAs
Improved observatory reading and a obs class.  Added WGS-84 conversion.
Removed debugging print and fixed typo
Added lat/lon for observatories and IERS correction for UT1-UTC.