fix(dataFrameShow): Remove extra new lines

.pylintrc

@@ -3,7 +3,7 @@
 variable-rgx=[a-z0-9_]{1,30}$
 good-names=log
 
-disable=invalid-name,unused-argument,too-few-public-methods,no-self-use,missing-docstring,logging-format-interpolation,too-many-instance-attributes,duplicate-code,too-many-public-methods,too-many-arguments,protected-access,too-many-lines
+disable=invalid-name,unused-argument,too-few-public-methods,no-self-use,missing-docstring,logging-format-interpolation,too-many-instance-attributes,duplicate-code,too-many-public-methods,too-many-arguments,protected-access,too-many-lines,unspecified-encoding,consider-using-dict-items,consider-using-with
 
 [FORMAT]
 max-line-length=119

pysparkling/sql/ast/README.md

@@ -0,0 +1,26 @@
+# Python Abstract Syntax Tree for Spark SQL
+
+This folder uses ANTLR4 to convert a SQL statement in an Abstract Syntax Tree in Python.
+
+This AST is then transformed in the corresponding pysparkling abtrasaction.
+
+## Example
+
+
+## Recreate generated files
+
+First, download the ANTLR complete JAR from [the ANTLR site][antlr].
+
+[antlr]:http://www.antlr.org/
+
+Next, install the required dev ANTLR4 Python 3 runtime package:
+
+```
+pip install antlr4-python3-runtime
+```
+
+Then, run ANTLR to compile the SQL grammar and generate Python code.
+
+```
+java -Xmx500M -cp "<path to ANTLR complete JAR>:$CLASSPATH" org.antlr.v4.Tool -Dlanguage=Python3 SqlBase.g4
+```