Adds a new method isChanged() for determining if a value was changed.
This is done in preparation for a more elaborated caching method that is
handled inside the abstract base class.
Change-Id: Ica15f77d96453d30edd3a117c7185c694ad3691e
The Math.body file which contains the MathRender class was split in the following way:
- Math.base contains the base class with the database related stuff and provides an abstract interface
- Math.source and Math.MathJax handle the plain tex string output. There are two classes since they
will differntiate in the future I think.
- Math.texvc contains the "old" implementation of png generation with all the file handling related stuff
- Other implementation of math renderer can be added in the same style.
- Cleanup to better follow coding conventions.
- Changed LockManager to 'fsLockManager'
The first attempt restructure the class layout and introduce LaTeXML at the same
time was dropped. Instead this was split up into two phases.
This commit only deals about the restructuring of the math module design.
Change-Id: I9b1d68c4faa8d177d8d0088fa1a5879caed4f1fe
