Updated cyclohexane EOS from the form of Zhou, JPCRD, 2014

Closes https://github.com/CoolProp/CoolProp/issues/292

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>

CoolPropBibTeXLibrary.bib

@@ -1846,6 +1846,19 @@
   url = {http://prod.sandia.gov/techlib/access-control.cgi/2001/012100.pdf}
 }
 
+@ARTICLE{Zhou-JPCRD-2014,
+  author = {Yong Zhou and Jun Liu and Steven G. Penoncello and Eric W. Lemmon},
+  title = {{An Equation of State for the Thermodynamic Properties of Cyclohexane}},
+  journal = {J. Phys. Chem. Ref. Data},
+  year = {2014},
+  volume = {43},
+  pages = {043105-1:12},
+  abstract = {Erratum: Reference values for enthalpy and entropy in the homogeneous
+	phase are incorrect as published},
+  owner = {Belli},
+  timestamp = {2014.12.06}
+}
+
 @ARTICLE{Zhou-JPCRD-2012,
   author = {Yong Zhou and Jiangtao Wu and Eric W. Lemmon},
   title = {{Thermodynamic Properties of o-Xylene, m-Xylene, p-Xylene, and Ethylbenzene}},

dev/fluids/CycloHexane.json

@@ -240,7 +240,7 @@
   "EOS": [
     {
       "BibTeX_CP0": "", 
-      "BibTeX_EOS": "Zhou-PREPRINT-2014", 
+      "BibTeX_EOS": "Zhou-JPCRD-2014", 
       "STATES": {
         "hs_anchor": {
           "T": 608.96, 
@@ -299,8 +299,8 @@
       "accentric_units": "-", 
       "alpha0": [
         {
-          "a1": 0.991141, 
-          "a2": 1.63455, 
+          "a1": 0.9891140602, 
+          "a2": 1.6359660572, 
           "type": "IdealGasHelmholtzLead"
         }, 
         {
@@ -321,12 +321,6 @@
             8.11958092485549
           ], 
           "type": "IdealGasHelmholtzPlanckEinstein"
-        }, 
-        {
-          "a1": -0.00200013140987743, 
-          "a2": 0.00140083113349826, 
-          "reference": "NBP", 
-          "type": "IdealGasHelmholtzEnthalpyEntropyOffset"
         }
       ], 
       "alphar": [
@@ -356,16 +350,16 @@
             1
           ], 
           "n": [
-            0.0548405, 
-            1.60777, 
-            -2.376, 
-            -0.51375, 
-            0.18584, 
-            -0.90075, 
-            -0.5629, 
-            0.2903, 
-            -0.3279, 
-            -0.03178
+            0.05483581,
+1.607734,
+-2.375928,
+-0.5137709,
+0.1858417,
+-0.9007515,
+-0.5628776,
+0.2903717,
+-0.3279141,
+-0.03177644
           ], 
           "t": [
             1, 
@@ -443,16 +437,16 @@
             0.86
           ], 
           "n": [
-            0.8669, 
-            -0.1963, 
-            -0.1426, 
-            0.004198, 
-            0.1777, 
-            -0.04434, 
-            -0.03861, 
-            0.074, 
-            0.02036, 
-            0.0027278
+          0.8668676,
+        -0.1962725,
+        -0.1425992,
+        0.004197016,
+        0.1776584,
+        -0.04433903,
+        -0.03861246,
+        0.07399692,
+        0.02036006,
+        0.00272825
           ], 
           "t": [
             1.6,