latex-mode-expansions.el: Replace `latex-mode' by `LaTeX-mode'

The wrong hook is used otherwise.
features/latex-mode-expansions.feature: Add simple test for math mode
Merge pull request #87 from thisirs/master

Expansions not loaded in latex-mode
Add expansion for python.el to mark a decorator on top of a block

    - added er/mark-python-block-and-decorator
er/mark-python-block-and-decorator: don't keep going up after passing decorator lines
Improve er/mark-python-block-and-decorator
Add adapter for web-mode.el expansions
Run tests in Emacs23, 24 and snapshot
Merge pull request #89 from vmalloc/issue-86

Issue #86: Add expansion for python.el to mark a decorator on top of a block
Add @vmalloc to list of Contributors
Merge pull request #90 from vmalloc/web-mode

Add adapter for web-mode.el expansions (Issue #84)
Update README.md
Add marking of clojure set literal.