bigarith.js/documentation/list_constants.md

Do very large math to precision!

### List of constants
Here is a updated list of constants predefined in BigArith.js
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	<thead><tr><td>Constant</td><td>Description</td><td style="width:130px">Value (to 200 decimal places)</td><td>Usage</td></tr></thead>
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		<tr><td>PI</td> <td>pi</td> <td>3.14159265358979323846...196</td><td>var ba = new BigArith("PI");</td></tr>
		<!-- -------------------------------------------------------------------------------------------
		<tr><td>LN2</td> <td>ln(2)</td> <td>0.6931471805599453</td><td>var ba = new BigArith("LN2");</td></tr>

		<tr><td>LN10</td><td>ln(10)</td><td>2.302585092994046</td><td>var ba = new BigArith("LN10");</td></tr>

		<tr><td>LOG2E</td> <td>log<sub>e</sub><sup>2</sup></td> <td>1.4426950408889634</td><td>var ba = new BigArith("LOG2E");</td></tr>

		<tr><td>LOG10E</td> <td>log<sub>e</sub><sup>10</sup></td> <td>0.4342944819032518</td><td>var ba = new BigArith("LOG10E");</td></tr>
		-------------------------------------------------------------------------------------------		-->

		<tr><td>SQRT1_2</td> <td>&#8730;&#0189;</td> <td>0.70710678118654752440...574</td><td>var ba = new BigArith("SQRT1_2");</td></tr>

		<tr><td>SQRT2</td> <td>&#8730;2</td> <td>1.41421356237309504880...147</td><td>var ba = new BigArith("SQRT2");</td></tr>

		<tr><td>E</td> <td>e</td> <td>2.71828182845904523536...901</td><td>var ba = new BigArith("E");</td></tr>
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Full documentation is [here](https://github.com/osofem/bigarith.js/tree/master/documentation).