Redirect from root to /Home, fixes #250
[Fix] Inline latex formula alignment

Fixed an issue of latex inline formulas not aligning correctly with
the text. The fix is a ruby translation of the Perl code described in
http://tex.stackexchange.com/questions/44486/pixel-perfect-vertical-alignment-of-image-rendered-tex-snippets.
This code calculates the alignment of the generated image depending on
the image size and the size of the white space between the formula and
the margins of the image.

The alignment now is nearly perfect, however the new rendering comes
with a performance impact because of the increased number of operations.
To reduce this impact, the generated images and calculated values for
the alignment are now cached in `~/.cache/gollum`. The caching is done
per formula and not per page, thus avoiding caching the same formula
twice.

The Readme and tests have been modified accordingly with the new tool
requirements and expected markup.
[Removed] Unnecessary `require 'time'` line.
[New] Support `$` and `$$` as formula delimiters.

Although the standard formula delimiters for latex formulas is currently
`\(` and `\[`, the `$` syntax has an advantage from the point of view of
writing speed, very important if we intend to use *gollum* as a writing
tool.

The code includes support for escaping of the `$` symbol by using the
gollum syntax `'`.
Fix location for live preview.
[Fix] Replaced random escaping of `$`

The `$` symbol is now escaped by replacing it with a static string.
Document building the gem from master.
[ci skip]
Update readme.
Fix #376.
New syntax for sequence diagrams is {{{{{{ }}}}}}.
Merge pull request #385 from bootstraponline/sequence_no_conflict

Fix #376.
Hacky fix for encoding issues
Fix #386. File view defines its own layout.
Update livepreview for new Ace.
Update readme.
Update Ace.
Fix for 1.8 versions of ruby
Fix #389.
Set page name correctly on preview.
Enable MathJax for live preview.
Merge pull request #377 from pipex/latex-align

[Fix] Inline latex formula alignment
Merge pull request #379 from pipex/latex-dollar-sign

[New] Support `$` and `$$` as formula delimiters.