fix sanitizeRegex to not strip "dots"

sanitizeRegex was stripping dots in permalinks when generating
RenderIndexes (noted during feed/rss generation).

permalink was being set to `.../indexxml` instead of `.../index.xml`.

Adding "dot" to the regex whitelist fixed the issue.
move "dot" in regex to avoid it being part of a range
Test GetParam and the various incarnations of frontmatter.
gofmt pass

Clean up test files.
Ignore dotfiles in content directory

This supports my personal workflow of using vim which places a temporary file in the same directory as the file I'm editing.
Adding support for recent content.
Adding support for a default content type template
default template found at layouts/_default/single.html
Merge pull request #31 from cactus/issue-31

sanitizeRegex chopping dots
Merge pull request #37 from noahcampbell/master

Test GetParam and the various incarnations of frontmatter.
Merge branch 'master' of github.com:spf13/hugo
Now support for nested paths. Better section detection.
Merge pull request #38 from noahcampbell/workflow_dotfile

Workflow dotfile
Further work on path/section stuff. Tests passing now.
Merge branch 'master' of github.com:spf13/hugo