Added installation instructions for new pkg mode in README

README.md

@@ -11,25 +11,37 @@
 # PeriodicTable.jl
 A very simple package for accessing elements in the Periodic Table! :fire:
 
-## Installation
+### Installation
 Since PeriodicTable is registered in `METADATA.jl`, you can directly install it like,
-```jl
+```julia
+julia> using Pkg
 julia> Pkg.add("PeriodicTable")
 ```
 
-## Update
-```julia
-julia> Pkg.update("PeriodicTable")
-```
 
-## How it works?
+### How it works?
 PeriodicTable.jl provides a Julia interface to a small database of element
-properties for all of the elements in the periodic table.    In particular
-```jl
-using PeriodicTable
+properties for all of the elements in the periodic table. In particular `PeriodicTable` exports a global variable called `elements`, which is a collection of
+`Element` data structures.
+
+```julia
+julia> using PeriodicTable
+
+julia> elements
+Elements(…119 elements…):
+H                                                  He
+Li Be                               B  C  N  O  F  Ne
+Na Mg                               Al Si P  S  Cl Ar
+K  Ca Sc Ti V  Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
+Rb Sr Y  Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I  Xe
+Cs Ba    Hf Ta W  Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
+Fr Ra    Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
+Uue                                                   
+      La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu    
+      Ac Th Pa U  Np Pu Am Cm Bk Cf Es Fm Md No Lr
 ```
-exports a global variable called `elements`, which is a collection of
-`Element` data structures.  You can look up elements by name (case-insensitive)
+
+You can look up elements by name (case-insensitive)
 via `elements["oxygen"]`, by symbol via `elements[:O]`, or by number via
 `elements[8]`, for example.
 
@@ -39,7 +51,7 @@ All physical quantities are [unitful](https://github.com/ajkeller34/Unitful.jl).
 
 The data is pretty-printed when you look up an element in the Julia REPL.
 For example:
-```jl
+```julia
 julia> elements["oxygen"]
 Oxygen (O), number 8:
         category: diatomic nonmetal
@@ -58,7 +70,7 @@ e⁻-configuration: 1s² 2s² 2p⁴
 
 ```
 Alternatively, you may want to get a list of elements,
-```jl
+```julia
 julia> elements[1:4]
 4-element Array{PeriodicTable.Element,1}:
  Element(Hydrogen) 
@@ -67,30 +79,15 @@ julia> elements[1:4]
  Element(Beryllium)
  ```
 
-### View the Periodic Table!
-```julia
-julia> elements
-Elements(…119 elements…):
-H                                                  He
-Li Be                               B  C  N  O  F  Ne
-Na Mg                               Al Si P  S  Cl Ar
-K  Ca Sc Ti V  Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
-Rb Sr Y  Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I  Xe
-Cs Ba    Hf Ta W  Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
-Fr Ra    Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
-Uue                                                   
-      La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu    
-      Ac Th Pa U  Np Pu Am Cm Bk Cf Es Fm Md No Lr
-```
-
-## Data by
-* [Periodic-Table-JSON](https://github.com/Bowserinator/Periodic-Table-JSON)
+### Data by
+The data used for this package has been pulled up in parts from [here](https://github.com/Bowserinator/Periodic-Table-JSON).
+Some information has been (and will be) added over time.
 
-## Developed together with
+### Developed together with
 * [Steven G. Johnson](https://github.com/stevengj)
 * [Jacob Wikmark](https://github.com/lancebeet)
 * [Carsten Bauer](https://github.com/crstnbr)
 
-## Facing issues? :scream:
+### Facing issues? :scream:
 * Open a PR with the detailed expaination of the issue
 * Reach me out [here](https://www.rahullakhanpal.in)