Embedded images

• Added support for embedding the images directly into the questions
• Minor improvements all over

Fixed minor bug

- gift_wrapper

	- core.py
		- fixed bug: if no latex formula is present, no attempt should be made to delete latex files

More polishing

• Python >=3.6 is honored
• new parameter for latex auxiliary file
• support for specifying error as a percentage in numerical questions

Added support for checking latex formulas

• Every latex formula is optionally checked
• Minor improvements here and there
• More documentation

Fixed bug in the solution of numerical questions

• Fixed bug when generating the answer to numerical questions
• Improved latex support
• the suffix of the output file is now .gift.txt since sometimes Moodle doesn't play well with extensions other than .txt

Already functional

Hello world!!