Add Readme.md with further development plan

Readme.md

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+# Network Packet Composer
+
+Is a software to create network packets from scratch for testing purposes.
+
+# Minimal functionality in first alpha version
+
+Be able to:
+
+- Show a row of fields where one field has
+  - A name
+  - A description
+  - A size in bit (values greater are just cut off)
+  - A value (input in hex)
+- Convert this row of fields to a binary array through RAB (RandomAccessBinary)
+- Show the created binary array in hex
+
+# Second alpha version
+
+Be able to:
+
+- Use integer as value input, not hex
+- Restrict field input with regular expressions
+- Write the binary to file (through proper interfaces which may be replaced by sending through the network!)
+- Highlight current field inside the shown binary in hex
+
+# Third alpha version
+
+- Allow also text as value input for data payload
+  - Means also having a special marked field for payload data (checkbox?)
+- Write and read field structure in YAML to disk
+
+# Fourth alpha version
+
+- Create multiple structures, meaning protocol stacks
+- Write network send logic
+
+# Fifth alpha version
+
+- Optimize
+- Think about next additional features
+- Release beta
+
+# First beta - TODO