update comment on ignoring repositories.config
fix magento root files

without leading slash, it ignores all files with these names (cron.php,
get.php, index.php, api.php), whereveer they are
Ignore modman directory
Add ignore achemso aux file acs-<tex filename>.bib

Ignore acs-*.bib, an aux file generated by \documentclass{achemso} or by \usepackage{achemso}
Merge pull request #1327 from lighght/patch-1

add ignore achemso bib file (acs-*.bib) to TeX.gitignore
Merge pull request #1323 from aurmil/magento-root-files

Fix Magento PHP root files names patterns
Merge pull request #1218 from bbodenmiller/patch-3

update comment on ignoring repositories.config
Merge pull request #1325 from aurmil/magento-modman

Ignore Magento .modman directory