More documenation

[mnbi]

At least, description of API for the following module/class is needed to use textrepo.

• Textrepo
• Textrepo::Timestamp
• Textrepo::Repository

[mnbi]

In 0.4.3, some RDoc comments were in wrong format. Because of this issue, those comments are missing in the RI documents.

For example, in FileSystemRepository class, there is a comment looks like:

##
# Deletes the file in the repository.

# :call-seq:
#     delete(Timestamp) => Array

def delete(timestamp)

An empty line before ":call-seq:" is wrong. Just remove the line or replace with an empty comment.

[mnbi]

Following classes should have rdoc comments:

• [x] all error classes those are derived from Textrepo::Error
• [x] Textrepo::Timestamp
• [x] Textrepo::Repository
• [x] Textrepo::FileSystemRepository

[mnbi]

Checked all documents generated by rdoc. See the check list in the above comment.