update readme

Author: iefthymio

py4madx/README.md

@@ -2,6 +2,15 @@
 
 Functions to help usage of cpymad for LHC analysis.
 
-Note: 
-The functions **twiss2df** and **table2df** converts MADX tables to dataframe. The default option is to use the raw elements name, i.e. without the ':' extension as index. If option 'comp' is used the complete MADX element name is used instead. 
+## pmadx
+Functions for frequent actions in MADX for LHC analysis
+*Note*: 
+- The functions **twiss2df** and **table2df** converts MADX tables to dataframe. The default option is to use the raw elements name, i.e. without the ':' extension as index. If option 'comp' is used the complete MADX element name is used instead. 
 
+## beambeam
+Functions to install Beam Beam elements in LHC beams
+
+The elements are defined with parameters as deferred assignments therefore can be updated according to needs. The information at all stages is contained in panda DataFrames. 
+
+## qslice
+Basic functions to slice a beam for HO Beambeam