Asm task05

[akaruitori]

Added saving .cor-files content Also refactored reading process a bit to unify reading of .s and .cor files. And added tests for .cor-reading.

read_binary_file() does the following:

• determines a minimal possible file size (which is in fact the same as a header size);
• tries to read that that size of bytes from the file;
• if it reads enough bytes and no reading error occur -- it saves header and tries to read champion code;
• if not: shows file error if file size is lesser than expected, or reading error in case of read() returning negative value;

read_binary_champ_code():

• tries to determine code size using lseek();
• if no error occur -- saves the actual code size and all data;