
*) Mixture Ratio Range calculations (show TDK influence)
*) propellant MR recommendations: http://www.braeunig.us/space/propel.htm
*) get historical MR values from: https://engineering.purdue.edu/~propulsi/propulsion/rockets/liquids.html

*) remove fortran fast calc... replace with M_Pool logic.

*) make rocketcea HELP launch web browser help.
   PRISM updates with "make_dist.bat" file.
   could put in... UPLOAD_TO_PyPI.BAT like PyHatch

*) make a jupyter notebook

*) Simple summary output

*) add ability to "omit" species

*) add ability to make blends of multi-part cards.

*) Assure compiled py_cea for:
   2.7, 3.5, 3.6, 3.7 windows 32bit  (got 2.7, 3.5, 3.6, 3.7)
   2.7, 3.5, 3.6, 3.7 windows 64bit  (got 2.7, 3.5, 3.6, 3.7)

   2.7, 3.5, 3.6, 3.7 linux 32bit (got 2.7, 3.5, 3.6)
   2.7, 3.5, 3.6, 3.7 linux 64bit (got 2.7, 3.5, 3.6)
   
miniconda 4.2 is py3.5,  >  4.2 is py3.6

*) test pip install rocketcea
   ======== WINDOWS ============
   py27 32bit, "pyXY prism" machine ... GOOD
   py27 64bit, "Win7 py27_64" machine ... GOOD
   py35 64 bit, "Win7 py35_64" machine ... GOOD
   py36 64 bit, "Win7 py36_64" machine ... FAIL w/o err message... flat plots. ... GOOD
        python installed at C:\Program Files\Python36
        ... GOOD when installed at C:\Python36
   py37 64 bit, "Win7 py37_64" machine ... FAIL during matplotlib build.

   
   ======== LINUX =============
   LinuxLite32 machine (failed on matplotlib install) ... FAIL
   LinuxMintCinn32 OLD...machine (failed on InsecurePlatformWarning) ... FAIL
   
   LinuxLite64 py27_64 failed with "please install python-tk package"... GOOD
               sudo apt-get install python-tk
               py35_64 failed with "please install python3-tk package"... GOOD
               sudo apt-get install python3-tk
   
   LinuxMint32 18.3, sudo apt-get install python-pip ... FAIL
                     sudo apt-get install python-matplotlib
                     sudo apt-get install python-tkinter
                     sudo apt-get install python-setuptools
   LinuxMint32 18.3, sudo apt-get install python3-pip ... FAIL
                     sudo apt-get install python3-matplotlib
                     sudo apt-get install python3-tkinter
                     sudo apt-get install python3-setuptools
   
   Ubuntu Mate 18.04, py27_32 worked after many depency installs.
                      py3_32 
   
   