Bugs: CIAO installed using conda

For detailed information and examples of running this tool, refer to the conda ahelp file.

Bugs

CIAO and StSCI's astroconda which fail due to version incompatibilities in the CFITSIO library.
There is a conflict between CIAO and HEASARC's XSPEC package. Users must
1. First, initialize their HEASARC environment
```
$ export HEADAS=/soft/lheasoft/headas/x86_64-pc-linux 
$ source $HEADAS/headas-init.sh
```
2. Then activate their CIAO environment
```
$ conda activate ciao
```
3. Finally, users have to restore the HEADAS environment variable back to it's original value
```
$ export HEADAS=/soft/lheasoft/headas/x86_64-pc-linux 
```
Note: this may cause problems using XSpec models in sherpa. Users must not source the headas-init.sh script after activating the CIAO environment as it will cause incompatibilities in the suite of parameters tools: pset, pget, and plist.