rewrite README with new install

README

@@ -1,16 +1,28 @@
 reisefill is a project to simplify filling out pdf forms.
-Two scripts are available:
-• fillform: fills a pdf form by asking you questions
-• readformdata: helps for creating config files that can be used by fillform
-Both have some help available via the option --help/ -h.
+
+INSTALLATION
+============
+Call the script
+
+  ./install.py
+
+to install the scripts fillform, reise and uninstall-fillpdf and add a config file.
+For options in the install call:
+
+  ./install.py --help
+
+USE
+===
+Several scripts are available:
+  • reise: creates a new directory with all files necessary for a business trip
+  • fillform: fills a pdf form by asking you questions. Should be run in a directory created with 'reise'
+  • uninstall-fillpdf: remove the links in the PATH that were created during install
+  • ./readformdata.py: helps for creating config files that can be used by fillform
+
+All of them have some help available via the option --help/ -h.
 The configuration file syntax is decribed in doc/configspecification.
 
-Prerequisites:
-  for fillform one needs the python module fdfgen.
-  https://github.com/ccnmtl/fdfgen
-  Either install fdfgen with
-  pip3 install fdfgen
-  or copy the file https://github.com/ccnmtl/fdfgen/blob/master/fdfgen/__init__.py
-  to somewhere python can find it (e.g. project directory) and call if fdfgen.py
-
-  for fillform one needs the command line programm pdftk
+Prerequisites
+=============
+  • python3 in /usr/bin/python3
+  • pdftk: for fillform the command line programm pdftk must be installed