Feature: Add ability to get title from file's frontmatter

[garyng]

Using front-matter.
Get the title from a file's frontmatter, fallback to use filename if no frontmatter can be found (eg, for README file)

Not very familiar with js though, so some optimization still can be done.

[coveralls]

Coverage increased (+0.7%) to 86.875% when pulling 942fad0 on garyng:master into a256019 on imfly:master.

[coveralls]

Coverage increased (+0.9%) to 87.037% when pulling f9a74f8 on garyng:master into a256019 on imfly:master.

[garyng]

Added option to disable completely title formatting.
lodash's .startCase will remove certain characters (such as the # in C#)

todo:

1. add option to only format folder name while preserving filename
2. or skip formatting file name when title can be read from the file's frontmater

[abeggchr]

I am using garyngs version and it works perfectly. Very much in favour of accepting this PR.

Two review findings:

• The complete feature is not documented in the README.md
• The "Ignores" flag no longer compares the file names but the title from the frontmatter. It can be argued that this is logical, but then it certainly needs additional documentation about the ignores flag.

[coveralls]

Coverage increased (+0.9%) to 87.037% when pulling 79cf085 on garyng:master into a256019 on imfly:master.

[imfly]

Thank you very much. Can you add the instructions to the ReadMe.md？

[coveralls]

Coverage increased (+0.9%) to 87.037% when pulling 53d4f8f on garyng:master into a256019 on imfly:master.

[coveralls]

Coverage increased (+0.9%) to 87.037% when pulling 53d4f8f on garyng:master into a256019 on imfly:master.

[garyng]

Added by @abeggchr. Thanks!