Init teach process
bacis
Merge branch 'master' into VR_teach_dtd
Reorganize structure of project. Move to 'src' folder
Describe university && faculty
Finish dtd-description
Move xml+dtd file in 'xml' folder
Forgot to add 'dtd' file in stage
Add some security-check in 'xmltree'.Replace NULL with 0
Fix errors in the dtd-file. Validation : PASS
Add validator-example from xmfsotf.org in 'temp' folder
Start to add DTD-validfation in 'xmltree'
Realize 'validateFileWithDTD' function
Use DTD func in main function. Remove extra code
Add dtd validation in console mode of program
Remove validator-example from temp folder, Due to it's included in console mode of xmltree
dtd
temp