Add README.md with random thoughts

Signed-off-by: Juraj Oravec <jurajoravec@mailo.com>

README.md

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+# Why ?
+
+As an attempt to provide similar functionality as Vector CanApe does.
+But only **ONE** instance of CanApe can be running at the computer and
+trying to load different ELF file to inspect variables is a pain and
+can easily result in broken project, workflow or headache.
+
+
+# Usage
+
+```bash
+usage: main.py [-h] [--include-file-name] [--version] [file]
+
+Expands symbols (global variables) types.
+
+positional arguments:
+  file                 ELF file to try to extract symbols
+
+options:
+  -h, --help           show this help message and exit
+  --include-file-name  Display filename at the beginning
+  --version            show program's version number and exit
+
+Data displayed by this script are informative only!
+```
+
+
+## Output
+
+```bash
+> python main.py ../Playground_C/build/playground_c
+0x4030  my_stuff
+0x4030  my_stuff.first
+0x4030  my_stuff.first.number_1
+0x4038  my_stuff.first.number_2
+0x403c  my_stuff.first.number_3
+0x403e  my_stuff.first.number_4
+0x403f  my_stuff.first.number_5
+0x4040  my_stuff.second
+0x4038  my_little_stuff
+0x4038  my_little_stuff.one
+0x4038  my_little_stuff.two
+0x4040  my_small_stuff
+0x4040  my_small_stuff.one
+0x4040  my_small_stuff.one[0]
+...
+0x4057  my_small_stuff.one[23]
+0x4040  my_small_stuff.structure
+0x4040  my_small_stuff.structure.first
+0x4040  my_small_stuff.structure.first.number_1
+0x4048  my_small_stuff.structure.first.number_2
+0x404c  my_small_stuff.structure.first.number_3
+0x404e  my_small_stuff.structure.first.number_4
+0x404f  my_small_stuff.structure.first.number_5
+0x4050  my_small_stuff.structure.second
+0x4060  thing
+0x4060  thing.first
+0x4060  thing.first.number_1
+0x4068  thing.first.number_2
+0x406c  thing.first.number_3
+0x406e  thing.first.number_4
+0x406f  thing.first.number_5
+0x4070  thing.second
+```
+
+
+# Licensing
+
+This script is based on `dwex` DWarf EXplorer by "Seva Alekseyev". The
+original source code of `dwex` can be found on
+[GitHub](https://github.com/sevaa/dwex)1
+
+Since it is derived work and licensing can be a mess, the resulting
+license follows the original and thus the code is licensed under BSD
+license.