New methods for writing and compiling TeX

The write method only writes a blueprint file in the new mint/ structure. 
and then calls make with an intermediate target to generate a skel file. 

CompileTex - if called - and it does not always need to be - then compiles 
creates the final TeX file from the skel and goes all the way to PDF and 
JPEG (if needed ) generation 

The changes here can be merged and the .aar uploaded before 
changes in Rails and Gutenberg are incorporated